JPH07307631A - Automatic output controller - Google Patents

Abstract

PURPOSE:To improve the accuracy of an automatic output controller and to lower power consumption by accelerating automatic output control at the time of rising burst signals by weighting coefficient control and further holding an output signal level without the degradation of modulation accuracy at stable time. CONSTITUTION:In first and second weighting means 43 and 45, for burst input to an output control mechanism 41, the weighting amount of the means 43 is made large and the weighting amount of the means 45 is made small at the time of starting burst. Then, as the time elapses, the weighting amount of the means 43 is made smaller and the weighting amount of the means 45 is made larger. In such a manner, an average value is calculated while following up input signals at a high speed in a calculation means 46 at the time of starting the burst, a control value from a control value generation means 47 is sent to the output control mechanism 41 corresponding to the value and the output signal level is converged to a target value at a high speed. On the other hand, when the time elapses after the start of the burst, even for the noise fluctuation of the input signals for which the time series of signals in the past are dominant in average value calculation, an output control operation is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic power control (APC: Automatic Power Control) used in a wireless communication device or the like.
l) Concerning the device. In a wireless communication device that performs burst output, such as a TDMA mobile communication terminal, when performing burst output, the output is required to have a constant level and good modulation accuracy, and the device is small and low in size. Power consumption and low cost are required. Accordingly, the automatic output control device is required to have high accuracy, high stability, downsizing, and easy adjustment.

[0002]

2. Description of the Related Art The structure of a conventional automatic output control device is shown in FIG. In the figure, 71 is a signal source, 72 is a control mechanism that controls and outputs the power level of an input signal, 73 is a comparison reference storage circuit that holds a predetermined reference value, and 74 is a reference value of the comparison reference storage circuit 73. A reference adjustment circuit to be changed, 78 is a detection unit that detects the output signal of the control mechanism 72 and outputs its amplitude value, and 79 is an amplitude value of the output signal detected by the detection unit 78 that is adjusted to an appropriate size for processing. An amplitude reference adjusting unit, 77 an integrating circuit for integrating (averaging) the output signal of the amplitude reference adjusting unit 79, and 75 comparing the integrated output from the integrating circuit 77 with the reference value from the comparison reference storage circuit 73. A comparator for outputting the comparison result such as the difference or the magnitude relation, and 76 is an integrating circuit for integrating (averaging) the comparison result from the comparator 75 and sending it as a control signal to the control mechanism 72.

In this conventional automatic output control device, the output signal of the control mechanism 72 is envelope-detected by the detection unit 78 to remove the high frequency component to extract the amplitude component, and the amplitude reference adjustment unit 79 further adjusts the amplitude value appropriately. After being adjusted to a proper size, the signal is passed through an integrating circuit 77 to remove noise components and envelope fluctuation components. The amplitude signal smoothed by the integration circuit 77 is compared with the reference value from the comparison reference storage circuit 73 by the comparator 75, and the difference or the magnitude thereof is used as a comparison result. The fluctuation of the envelope is suppressed to the extent that the signal modulation accuracy is not affected. By adding the output signal output from the integrating circuit 76 to the control mechanism 72 as a control signal, the output level becomes constant. By configuring the feedback loop in this way, the output level is adjusted to be constant.

[0004]

In the conventional automatic output control device, integrating circuits 77 and 76 for removing the fluctuation of the envelope are provided inside the feedback loop. Due to the existence of the integrating circuit, the feedback loop itself is provided. As a result, a time delay occurs in signal transmission. Therefore, when the burst signal is input, at the rising edge of the burst, the feedback loop cannot follow the level change of the rapid rising edge and cannot respond. Alternatively, there is a drawback in that a reverse control is applied depending on the initial value by the delay of that time, and a normal level cannot be output.

Therefore, a method of removing the integrating circuit is conceivable, but in this case, the feedback loop operates even for momentary fluctuation of the envelope of the output signal, so that the stability is lowered and the modulation accuracy is deteriorated. There was a problem of causing.

Further, even if the integrating circuit is provided, if the initial value is adjusted to some extent, the level looks normal during the time when no pseudo response is possible. Alternatively, the error increases due to the accuracy of the variation adjustment due to the frequency. When this error occurs, there is a problem that the control may stick to the upper limit side or the lower limit side depending on the loop gain, and may appear as a large error.

The present invention has been made in view of the above problems, and an object of the present invention is to perform automatic output control in response to a rising edge of a burst signal at high speed, and to input when stable after rising. An object of the present invention is to provide an automatic output control device capable of maintaining a stable output signal level even with respect to signal fluctuations and the like.

[0008]

FIG. 1 is a diagram illustrating the principle of the present invention. In order to solve the above-mentioned problem, in one aspect of the present invention, an output control mechanism 41 that adjusts and outputs the power of an input signal according to a control value, and an output signal magnitude of the output control mechanism 41. Of the output signal detected by the detection means 42, a holding means 44 for holding the average value of the past output signal series, and a holding means 44. The second weighting means 45 for weighting the time series average value of the past output signals, and the time series average value of the output signals are calculated and held from the output signals of the first and second weighting means 43, 45. The calculation means 46 for sending to the means 44, and the control value generation means 4 for generating a control value to be given to the output control mechanism 41 so that the output power of the output control mechanism 41 becomes constant based on the average value calculated by the calculation means 44. Equipped with a door, first,
The second weighting means 43, 45 increase the weighting amount of the first weighting means 43 and decrease the weighting amount of the second weighting means 45 for the burst input to the output control mechanism 41 at the start of the burst. An automatic output control device is provided in which the weighting amount of the first weighting unit 43 is gradually reduced and the weighting amount of the second weighting unit 44 is gradually increased with the passage of time.

Further, in another aspect of the present invention, an output control mechanism for adjusting and outputting the power of an input signal according to a control value and a detection means for detecting the magnitude of the output signal of the output control mechanism. Based on the average value calculated by this filter means, the average value of the output signal detected by this detection means is calculated by following the input signal at a high speed at the burst rising and gently following the rising signal. The automatic output control device is provided with: a control value generation unit that generates a control value to be given to the output control mechanism so that the output power of the output control mechanism becomes constant.

In the above-mentioned automatic output control device, the control value generation means includes reference value holding means for holding a comparison reference value,
Comparing means for comparing the average value calculated by the calculating means with the reference value of the reference value holding means and outputting the comparison result value, and the output power of the output control mechanism is converged to a constant value corresponding to the comparison result value. The control value storage means may store the control value and store the control value corresponding to the comparison result value from the comparison means and send the control value to the output control mechanism.

In the above automatic output control device,
The comparison means is configured to compare the average value calculated by the calculation means with the reference value of the reference value holding means and output the difference value, and the control value storage means outputs control corresponding to the difference value from the comparison means. A control value is stored so that the output power of the mechanism reaches a desired target value, and the control value is read from the control value storage means corresponding to the difference value from the comparison means to obtain the output signal of the output control mechanism. Can be configured to quickly converge to a target value.

In the above automatic output control device,
The comparison means is configured to compare the average value calculated by the calculation means with the reference value of the reference value holding means and output the difference value, and when the difference value is out of the normal operation range It is possible to determine the timing of adjusting the weighting amounts of the first and second weighting means such as.

In the above automatic output control device,
The control value generation means is configured to generate a control value corresponding to a condition including at least a signal frequency or device temperature, and is configured to read the control value corresponding to the condition and control the output control mechanism during operation. be able to.

In the above automatic output control device,
It is possible to provide weighting information setting means for externally setting the initial value and the final value of the weighting amounts of the first and second weighting means and the transition speed.

Further, the above-mentioned automatic output control device can be constructed so as to incorporate a write control means for writing the control value data in the control value storage means.

[0016]

In the automatic output control device of the present invention, the first,
The second weighting means 43, 45 increase the weighting amount of the first weighting means 43 and decrease the weighting amount of the second weighting means 45 for the burst input to the output control mechanism 41 at the start of the burst. , The weighting amount of the first weighting means 43 is gradually decreased, and the weighting amount of the second weighting means 44 is gradually increased. As a result, at the start of the burst, the calculation means 4
6, the input signal is tracked at high speed to calculate its average value, and the control value generation means 47 sends the control value to the output control mechanism 41 corresponding to the calculated value, and the output signal level becomes the target value at high speed. Is converged to. On the other hand, the time series of the past signal becomes dominant in the average value calculation with the lapse of time after the rise of the burst, and the operation of the automatic output control becomes stable even with respect to noise-like fluctuations of the input signal.

The above-described operation can be realized by using various filter means for calculating the average value of the input signal with respect to time series, which calculates at high speed at the rising edge of the burst and gently following the rising edge. .

If the control value generating means is composed of the reference value holding means, the comparing means and the control value storing means, the level of the output signal of the output control mechanism can be changed by changing the reference value of the reference value holding means. It can be easily changed to any size.

If a control value is stored in the control value storage means corresponding to the difference value (magnitude) output by the comparison means, the output power of the output control mechanism becomes a desired target value. The magnitude of the output signal of the output control mechanism can be immediately converged to the target value corresponding to the difference value from the comparison means.

Further, since the difference value of the comparing means is out of the normal operation range, it is possible to determine the timing of adjusting the weighting amounts of the first and second weighting means at the start of the burst.

Further, if the control value generating means is constructed so as to generate a control value corresponding to a condition including a signal frequency or equipment temperature, the control value is read out in accordance with the condition during operation to output the output control mechanism. Can be controlled, and an error due to the difference in these conditions can be suppressed.

Further, by providing the weighting information setting means, the initial value and the final value of the weighting amounts of the first and second weighting means and the transition speed can be arbitrarily set from the outside, whereby various input signals can be set. It is possible to easily perform control suitable for.

Further, the control value storage means can be constructed so as to have a built-in write control means for writing the control value data, whereby the control value can be appropriately updated as required and highly accurate control is possible. Becomes

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the configuration of an automatic output control device as an embodiment of the present invention. In the figure, 1 is a signal source, and the signal from the signal source 1 is output as an output signal via an amplifier 2 and a voltage control attenuator 3. Here, the amplifier 2 and the voltage control attenuator 3 operate as an adjusting mechanism for adjusting the power level of the output signal from the signal source 1.

A part of the output signal output from the voltage control attenuator 3 is branched and input to the wave detector 5 via the amplifier 4. The detector 5 envelope-detects a signal input in the RF (high frequency) band, converts it into a baseband signal, and outputs it. The A / D converter 6 A / D-converts the amplitude value of the baseband signal and then inputs it to the multiplier 7.

The multiplier 7 multiplies the input amplitude value by a weighting coefficient and outputs it to the adder 9. The output signal of the adder 9 is input to the delay device 10 and the subtractor 13, respectively. The output signal of the delay device 10 is input to the multiplier 8. The weighting coefficient is multiplied by the multiplier 8 and then input to the adder 9 to be added to the output signal from the multiplier 7. The circuit composed of the multipliers 7 and 8, the adder 9, and the delay device 10 has a function as an integrator that averages the time series of the input signal.

The comparison reference memory 12 is a rewritable ROM such as an EEPROM for storing reference values for comparison. This reference value is a value for setting the power level of the output signal from the voltage control attenuator 3 to a desired value,
It can be set to an arbitrary size by externally supplying reference value data through the write buffer 11. The reference value from the comparison reference memory 12 is input to the subtractor 13.

The subtractor 13 is a circuit for calculating the difference between the above reference value and the output signal from the adder 9, and the difference value is input to the control value memory 14 as an address signal.
The control value memory 14 corresponds to the magnitude of the input difference value, and stores the control value in the direction of converging the output side level of the voltage control attenuator 3 to a constant value with respect to the difference value. Rewritable RO
M, as will be described later, the write mode and the read mode are switched by a switching signal from the write control unit 27, and in the write mode, the control from the attenuator control data memory 29 using the difference value from the subtractor 13 as an address. Controlled to store value data. In the read mode, the control value read from the control value memory 14 using the difference value from the subtractor 13 as an address is D
After being converted into an analog signal via the / A converter 15, it is input to the voltage control attenuator 3 as a control voltage.

A high-speed clock source 17 generates a clock having a speed several times to several tens times that of the modulated data. The clock from the high-speed clock source 17 is supplied to the counter 18, the A / D converter 6, the delay device 10, etc. as an operation clock. Reference numeral 16 is an external clock buffer, and 18 is a counter. The counter 18 can receive the supply of the operation clock from the high-speed clock source 17 or from the outside via the external clock buffer 16. The output of the counter 18 is input to the adder 21 and the subtractor 23.

Reference numeral 22 is a coefficient holding unit for holding a coefficient (weighting amount) by which the multiplier 8 multiplies the input signal, 21 is an adder for calculating the coefficient held by the coefficient holding unit 22, and 24 is an input signal for the multiplier 7. A coefficient holding unit for holding a coefficient (weighting amount) to be multiplied by 23, a subtractor 23 for calculating a coefficient held by the coefficient holding unit 24, and 19 an initial value of data to be added / subtracted by the adder 21 and the subtractor 23. A clear data holding unit, 20 is a set value holding unit that holds set values of constants that are sequentially added and subtracted from the initial values by the adder 21 and the subtractor 23,
A clear control unit 26 clears the data held in the adder 21 and the subtractor 23.

Reference numeral 27 denotes a write control unit for controlling the entire apparatus including writing control values to the control value memory 14, and the like, 28
Is a signal source level control data memory, such as a ROM, which holds signal source level control data for controlling the output level of the signal source 1, 29 is an attenuator control data memory, which is the attenuation amount of the voltage control attenuator 3. It is a memory such as a ROM for holding attenuator control data (attenuator control voltage) for controlling the. When writing the control value to the control value memory 14, the write control unit 27 controls the control value memory 14 to switch from the read mode to the write mode to stop the data output, and also to control the signal source level control data. Control is performed to send signal source level control data from the memory 28 to the signal source 1, and to send an attenuator control voltage from the attenuator control data memory 29 to the subtractor 23 via the D / A converter 15.

The operation of the apparatus of this embodiment will be described below.
The modulated wave (RF wave) output from the signal source 1 is amplified by the amplifier 2 and then adjusted in level by the voltage control attenuator 3 including an analog element and output. A part of the output signal is branched to the amplifier 4 side, amplified by the amplifier 4, and then sent to the detector 5. In the detector 5, the high frequency component is removed by detecting the envelope of the RF input signal, and only the baseband signal is obtained, and then the A / D converter 6
To be a digital signal.

This digital signal is sent to the multiplier 7. The multiplier 7 multiplies the input signal by the coefficient data (weighting amount) of the coefficient holding unit 24, and sends the multiplication result to the adder 9. The adder 9 adds the output signals of the multiplier 7 and the multiplier 8, and the added value is input to the multiplier 8 through the delay device 10. In the multiplier 8, the coefficient holding unit 22 stores the added value.
The coefficient data (weighting amount) of is multiplied. The circuit composed of the multipliers 7 and 8, the adder 9 and the delay device 10 functions as an integrating circuit for averaging the time series of the input signal as described below.

First, the coefficient data in the coefficient holding units 22 and 24 will be described. The coefficient data are stored in the clear data holding unit 19, the set value holding unit 20, the adder 21, and the subtractor 2.
3. The setting is made as follows by the clear controller 26, etc., and is changed with the passage of time. First, the clear data holding unit 19 has an initial value (0.000 in this example) for addition operation in the adder 21 and an initial value (1.000 in this example) for subtraction operation in the subtractor 23. And the set value holding unit 20 holds a constant change value (0.002 in this example) that is sequentially added and subtracted by the adder 21 and the subtractor 23.

The adder 21 adds the change value (0.002) of the set value holding unit 20 to the initial value (0.000) every time the count value of the counter 18 increases, and the addition result is added to the coefficient holding unit. Hold at 22. Therefore, the coefficient data of the coefficient holding unit 22 is sequentially increased from 0 by 0.002 by this accumulation operation. Similarly, the subtractor 23 uses the counter 1
Each time the count value of 8 increases, the change value (0.002) of the set value holding unit 20 is subtracted from the initial value (1.000), and the subtraction result is held in the coefficient holding unit 24. Therefore, the coefficient data of the coefficient holding unit 24 is from 1.000 to 0.
It is gradually decreased by 002. In this way, the coefficients of the coefficient holding units 22 and 24 are changed by the addition and subtraction described above. That is, in the above specific example, the counter 18
If the value of changes by one, the coefficient of the coefficient holding unit 24 becomes 1.0
00 to 0.998, the coefficient of the coefficient holding unit 22 is 0.00
From 0 to 0.002, these coefficients are decreased / increased by 0.002 each time the value of the counter 18 increases.

Further, the clear control unit 26 clears the coefficient data in the coefficient holding units 22 and 24, and at the time of this clearing, the initial values from the clearing time data holding unit 19 are input to the adder 21 and the subtractor 23. Coefficient holding unit 22,
The coefficient held in 24 is also the initial value (that is, the coefficient holding unit 2
2 becomes 0.000 and the coefficient holding unit 24 becomes 1.000). The initial value data held in the clear data holding unit 19 and the change value held in the set value holding unit 20 can be arbitrarily set from the outside.

When the coefficient data in the coefficient holding units 22 and 24 is set and changed in this way, the weighting amount multiplied by the multiplier 7 is changed from 100% to (arbitrary coefficient)%, and the multiplier 8 is also added.
The weighting amount multiplied by can be sequentially changed from 0% to (100-arbitrary coefficient)%. As a result, when the coefficient of the multiplier 8 is not 0%, that is, when a certain amount of time has passed, the data placed in the delay device 10 becomes an average value of the time series of the signals input up to that time,
By adding the average value of the delay device 10 and the value obtained by multiplying the coefficient of the new input signal from the multiplier 7 side by the adder 9,
Further, a new average value including the new input signal will be calculated. Depending on the ratio of the coefficients of the multipliers 7 and 8 at this time, the new input signal on the multiplier 7 side becomes dominant, and the time series average value of the previous input signals on the multiplier 8 side is dominant. It also becomes a target.

Therefore, if the clear control unit 26 clears the coefficient value at the rise of the burst, all the data at the time when the signal source 1 is not outputting a signal before the rise of the burst is discarded and the data before the rise is increased. There is no influence of information, and the new input signal on the multiplier 7 side becomes dominant immediately after the burst rise, and the average value of the adder 9 can be rapidly risen without delay. With the passage of time, the time series (average value) of the past input signal on the multiplier 8 side becomes dominant, and the average value output from the adder 9 becomes stable, resulting in noise and fluctuations in the envelope in a steady state. On the other hand, the operation of the device can be stabilized.

The final ratio and the convergence speed of the coefficients of the coefficient holding units 22 and 24 are the clock speed of the high-speed clock source 17,
It can be determined by the set value of the counter 18 and the change value of the coefficient in the set value holding unit 20. These values can be arbitrarily set from the outside, and thus these coefficients can be appropriately set so as to correspond to various systems.

The average value calculated by the adder 9 is then calculated by the subtractor 1
3 and the difference from the reference value from the comparison reference memory 12 is calculated here. The calculated difference value is input to the control value memory 14 as a read address. As will be described later, the control value memory 14 stores the control data of the voltage control attenuator 3 such that the level of the output signal of the voltage control attenuator 3 converges to a predetermined constant value corresponding to each value of the difference. Has been done. Therefore, the subtractor 1
This control data is read from the control value memory 14 using the difference value from 3 as an address, and this is read by the D / A converter 15
After that, an analog control voltage is input to the voltage control attenuator 3 and the output signal level of the voltage control attenuator 3 is adjusted so as to converge to a predetermined constant value.

By the above operation, when the burst signal rises, the feedback loop quickly follows the change at the time of rise to stabilize the level of the output signal, and noise and envelope fluctuations occur with the passage of time after the rise. It is possible to stabilize the operation by preventing the control from being dragged.

Next, writing of control data to the control value memory 14 will be described. This writing is performed by the writing control unit 2
7. Signal source level control data memory 28, attenuator control data memory 29, etc. are used. First, the write control unit 27 sends a control signal to the control value memory 14 to switch the control value memory 14 to the write mode so that data is not output from the control value memory 14 to the voltage control attenuator 3. In addition, the coefficient holding units 22, 2
The coefficient 4 is set so that the coefficient on the multiplier 8 side becomes dominant.

Next, the write controller 27 sends the signal source level control data to the signal source 1 through the signal source level control data memory 28, and controls so that the output level of the signal source 1 becomes a desired level. In this state, the attenuator control data is converted into an analog voltage by the D / A converter 15 and sent to the voltage control attenuator 3 side through the attenuator control data memory 29. The subtractor 13 calculates a difference value corresponding to the output signal of the voltage control attenuator 3 at this time.

Therefore, the output signal level of the voltage control attenuator 3 is measured, and the attenuator control data (here, V ₀ ) when the output level reaches a desired value is
The difference value of the subtracter 13 output at that time (here, D ₀
Is written as a write address in the control value memory 14. Further, the control data value is changed stepwise in a predetermined upper and lower range (for example, V ₀ ± α) around the attenuator control data (V ₀ ) and the subtracter 13 obtained for each control data value. The difference value is used as an address and the corresponding control data value is written in the control value memory 14.
However, in this case, the changing direction of the address for each control data is set in the opposite direction centering on the reference address (D ₀ ).

For example, if the difference (D ₀ + β) is obtained with respect to the control data (V ₀ + α), the control data (V
₀ + α is the difference (D ₀ +) centered on the reference difference (D ₀ ).
The difference (D ₀ −β) obtained by reversing β) is written as an address in the control value memory 14, and conversely, the control data (V ₀ −).
When the difference (D ₀ −β) is obtained for α), the control data (V ₀ −α) is written in the control value memory 14 using the difference (D ₀ + β) as an address.

As described above, in addition to actually measuring that the output signal level of the subtractor 13 has reached the desired value and writing to the control value memory 14 using the attenuator control data at that time as a reference, calculation is also possible. Alternatively, attenuator control data having a desired value may be obtained and the value may be used as a reference.

When the attenuator control data is stored in the control value memory 14 in this way, the output signal level of the voltage control attenuator 3 converges to a desired constant value with respect to the difference value of the subtractor 13 during normal operation. Thus, the control data is read from the control value memory 14 and the feedback control is performed.

The control data of the voltage control attenuator 3 can be stored by changing the address for each condition. That is, for example, if the above-described writing process is performed for each of various reference values of the comparison reference memory 12 and the control data can be read from the control value memory 14 in correspondence with each reference value, that is, each reference value is also stored in the address. If the control data is read out from the control value memory 14 as a part of the control value memory 14, the output signal level of the voltage control attenuator 3 can be set corresponding to the reference value arbitrarily set in the comparison reference memory 12. .

By changing the output level of the signal source 1 outside the loop, the influence of the non-linearity of the adjusting mechanism (amplifier 2, voltage control attenuator 3) and the like is controlled.
4 can be incorporated into the control data, and the error of the adjusting mechanism can be reduced.

Further, the signal frequency from the signal source 1 is variously changed, the above-described processing is performed for each frequency, and the control data is written in the control value memory 14, and when operating, the control value memory 14 corresponds to the frequency. If the control data can be read out, even if the signal frequency is changed, the signal frequency can be input to the device from the outside, so that appropriate automatic output control corresponding to the signal frequency can be performed. It is possible to suppress the error caused by the difference in the signal frequency of.

Further, the equipment is changed to various temperatures, the above-mentioned processing is performed for each temperature, and the control data is written in the control value memory 14, and the control value memory 14 corresponding to each temperature during operation.
If the control data can be read from the voltage control attenuator 3 during actual operation, the temperature detector detects the temperature of the device and reads the control data corresponding to the temperature.
By performing the control of 1, the error caused by the temperature change can be suppressed.

As described above, by writing the control data under each environmental condition in the control value memory 14, it is possible to absorb the error in the loop and to generate accurate data. Further, as in this embodiment, a control data writing mechanism such as a write control unit 27, a signal source level control data memory 28, and an attenuator control data memory 29 is built in the apparatus, and for example, at any time such as when the power is turned on. By operating this writing mechanism to write the control data to the control value memory 14, it is possible to eliminate the error of the device due to the temperature fluctuation during operation, the secular change and the like.

Various modifications are possible in carrying out the present invention. For example, in the above-described embodiment, means is provided for detecting that the difference value output from the subtractor 13 is out of the normal operating range, that is, that the output signal level from the voltage control attenuator 3 has greatly changed. ,
If the coefficients of the multiplier 7 and the multiplier 8 are changed so that the output of the multiplier 7 side becomes dominant at the time of the detection as in the burst rising, the changed output signal level converges to a desired target value at high speed. It becomes possible. This method can also be used as a means for detecting the start of a burst signal, and it becomes possible to automatically determine the burst start timing in a loop and perform automatic output control for that burst.

As a concrete method of the detecting means, for example, 1 bit in the data of the control value memory 14 is used as a status display flag, and the status display of the data corresponding to the address whose difference value is out of the normal operation range is displayed. The flag is set to "1", and the write control unit 27 monitors this state display flag. When "1" is detected, the coefficients of the multipliers 7 and 8 are changed so as to be the same as those at the start of the burst. There is a method such as.

Further, in the above embodiment, the write control unit 2
7. The control data writing mechanism, such as the signal source level control data memory 28 and the attenuator control data memory 29, is incorporated in the apparatus, but the present invention is not limited to this, and these writing mechanisms are external to the apparatus. The control data may be written at the time of manufacturing or factory shipment, and in this case, the hardware scale, the cost, the current, and the mounting area for the write mechanism can be reduced. Whether this writing control mechanism is built-in or provided externally may be determined depending on the application of the device, for example, whether accuracy is required or cost is required to be suppressed.

Further, the method of writing the control data to the control value memory 14 is not limited to that of the above-mentioned embodiment, and for example, under various conditions, corresponding to the difference value from the subtractor 13, If control data (attenuation amount of the voltage control attenuator 3) is provided so that the output signal level of the voltage control attenuator 3 at that time converges to a desired target value at a time, the target value can be converged at high speed. In addition to the difference, the control data may be, for example, large or small information with respect to the reference value.

Further, in the above-mentioned embodiment, the comparison reference memory 12 and the subtractor 13 are composed of separate parts, but by digitizing these, the subtractor 13 is taken into the table and composed of one part. It is also possible to do so. That is, the comparison reference memory 12 and the subtracter 13 may be configured by a memory that holds the difference value corresponding to the output signal from the adder 9 and the output signal from the write buffer as addresses.

Further, the voltage control attenuator 3 may be a digitized one in addition to an analog element. In this case, the D / A converter is not required in the part that supplies the control voltage to the voltage control attenuator 3. Each function of the above device can be realized as an LSI.

[0059]

As described above, according to the present invention, the automatic output control at the rising edge of the burst signal can be speeded up by the weighting coefficient control, and when stable, the modulation accuracy is stable without degrading the modulation accuracy. The output signal level can be maintained. Further, since various data can be easily set and changed from the outside, various signals can be dealt with by arbitrarily changing the weighting coefficient, and the optimum stability can be selected. Also, by reflecting the information of the feedback loop such as non-linearity in the loop in the control data of the table, the uncertainty of the loop can be eliminated, and the error due to the frequency of the signal source, the temperature change of the equipment, etc. can be suppressed. It is possible to increase the proof strength against this. Further, if the control data writing mechanism is placed outside and is performed from the outside, the mounting area and power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram showing an automatic output control device as one embodiment of the present invention.

FIG. 3 is a diagram showing a conventional automatic output control device.

[Explanation of symbols]

 1 Signal Source 2, 4 Amplifier 3 Voltage Control Attenuator 5 Detector 6 A / D Converter 7, 8 Multiplier 9, 21 Adder 10 Delayer 11 Write Buffer 12 Comparison Reference Memory 13, 23 Subtractor 14 Control Value Memory 15 D / A converter 16 External clock buffer 17 High-speed clock source 18 Counter 19 Data holding unit at clear 20 Setting value holding unit 22, 24 Coefficient holding unit 27 Write control unit 28 Signal source level control data memory 29 Attenuator control data memory

Claims (8)

[Claims] 1. An output control mechanism (41) for adjusting and outputting the power of an input signal according to a control value, a detection means (42) for detecting a magnitude of an output signal of the output control mechanism, and the detection. First weighting means (43) for weighting the output signal detected by the means, and holding means (4) for holding the average value of the past output signal series.
4), second weighting means (45) for weighting the time series average value of the past output signals held in the holding means, and output signals from the output signals of the first and second weighting means. Calculating means (46) for calculating a time-series average value and sending it to the holding means, and for controlling the output control mechanism so that the output power of the output control mechanism becomes constant based on the average value calculated by the calculating means. Control value generating means (47) for generating a control value to be given, and the first and second weighting means of the first weighting means at the start of the burst with respect to the burst input to the output control mechanism. The weighting amount is increased, the weighting amount of the second weighting device is decreased, and the weighting amount of the first weighting device is gradually decreased and the weighting amount of the second weighting device is increased with the passage of time. Automatic output control device. 2. An output control mechanism for adjusting and outputting the power of an input signal according to a control value, a detection means for detecting the magnitude of the output signal of the output control mechanism, and an output signal detected by the detection means. The output power of the output control mechanism is constant based on the average value calculated by the filter means, which calculates the average value of the output signal at high speed at the rising edge of the burst and slowly following the rising edge. And an output control mechanism for generating a control value to be given to the output control mechanism. 3. The control value generating means compares a reference value holding means for holding a comparison reference value, an average value calculated by the calculating means with a reference value of the reference value holding means, and a comparison result value thereof. And a control value such that the output power of the output control mechanism converges to a constant value corresponding to the comparison result value are stored and stored in correspondence with the comparison result value from the comparison means. 3. The automatic output control device according to claim 1, further comprising a control value storage means for sending a control value to the output control mechanism. 4. The comparison means is configured to compare the average value calculated by the calculation means with the reference value of the reference value holding means and output the difference value, and the control value storage means stores the difference value. A control value is stored so that the output power of the output control mechanism corresponds to a desired target value corresponding to the difference value from the comparison means, and the control value is controlled from the control value storage means according to the difference value from the comparison means. 4. A configuration in which the value is read out and the magnitude of the output signal of the output control mechanism is rapidly converged to the target value.
The automatic output control device described. 5. The comparing means is configured to compare the average value calculated by the calculating means with the reference value of the reference value holding means and output the difference value, and the difference value is within a normal operating range. 4. The configuration according to claim 3, wherein the timing for adjusting the weighting amounts of the first and second weighting means at the start of the burst or the like is determined when it becomes outside.
The automatic output control device described. 6. The control value generating means is configured so as to generate a control value corresponding to a condition including at least a signal frequency or a device temperature, and during operation, the control value is read out in accordance with the condition to operate the output control mechanism. The automatic output control device according to claim 1, which is configured to control. 7. The weighting information setting means for arbitrarily setting an initial value and a final value of a weighting amount of the first and second weighting means and a transition speed from the outside. Automatic output control device. 8. The automatic output control device according to claim 1, further comprising write control means for writing control value data in the control value storage means.