JPH01227535A - Radio selective call receiver - Google Patents

Abstract

PURPOSE:To control the magnitude of a vibration, to reduce an energy consumption, and to lengthen the lifetime of a battery by using a loudspeaker as a microphone and interruptively operating a vibrator corresponding to the degree of a surrounding noise. CONSTITUTION:A surrounding noise component collected by a loudspeaker 32 used also as a microphone is amplified by a preamplifying circuit, it is converted to a direct current signal by an A-D converting circuit 31, a voltage to be temporarily held by a holding circuit 27 is inputted to a comparator circuit 26, and it is converted to a digital signal. A control circuit 22 sends the successive direct current signal or an interruptive signal to a vibrator driving circuit 14 based on the signal outputted from the comparator circuit 26, and the circuit 22 controls the motor rotation frequency of a vibrator 15. Namely, when the noise detected by the loudspeaker 32 is small, the motor rotation frequency is lowered and the vibration is weakened in order to cause an abnormal sound generation to be as small as possible. Thus, the energy consumption can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio selective calling receiver having a function of notifying the user of being called by the vibration of a ringing fork or vibrator.

[Conventional technology]

A wireless selective calling receiver (hereinafter referred to as a receiver) notifies the subscriber of a call by receiving a selective calling signal containing a specific selective calling number assigned to the subscriber. There are methods to notify by sound and methods to notify by vibration. - In the case of the sound method, the volume can be changed in several steps using a slide switch, etc., and the volume can be adjusted appropriately. In the case of the method using vibration, a /9 vibrator is used, and the vibrator can be vibrated by applying a power supply voltage to the vibrator for a certain period of time using a transistor switch or a mechanical switch.

FIG. 11 shows an example of a function switching mechanism of a conventional receiver. 1 is the receiver body, 2 is the sound output slit for the speaker that outputs the sound, 3 is the function changeover switch,
Select sound or vibration.

4 is a motor part of the vibrator, and 5 is a weight part of the vibrator. In this diagram, the 2-function selector switch 3 is set to V.
′ indicates that it is in vibrational operation.

FIG. 12 is a block diagram of the receiver of FIG. 11.

Briefly, a radio receiving section 6 receives a calling signal including a calling number, and a waveform shaping circuit 7 shapes a signal representing the calling number obtained from the received signal into a square wave.

The comparison circuit 8 compares the calling number information from the waveform shaping circuit 7 and its own calling number information stored in advance in the storage circuit 9 to see if they match, and if they match, sends a match signal to the control circuit 10. Output. Control circuit 1
0 receives the match signal, the speaker drive circuit 11.0 responds to the open state of the switch 5ttst. Drive one of the vibrator drive circuits 14.

The speaker or the vibrator 15 makes a sound or vibrates.

FIG. 13 is a diagram showing an example of a vibrator.
6 is a weight, and 17 is a motor.

[Problem to be solved by the invention]

When the above-mentioned receiver operates the vibrator, power supply voltage is applied to the vibrator motor, so the drive current always flows:
This speeds up the consumption of the limited small capacity battery inside the receiver. Also, the vibrator.

As shown in FIG. 13, an eccentric weight 16 is attached to the drive shaft of the motor 17 to generate vibration. For this reason, if the motor is connected directly to the battery and rotated at full speed, it may cause more vibration than necessary to the user. In addition, the vibrations from the motor 17 may resonate with other structures and produce abnormal noises, the two weights 16 may rotate at full speed and generate wind, or the motor 17 may rotate at full speed and produce abnormal noises. . This is because the user and other people around him may hear strange noises. 2 This is contrary to a call that does not make any sound, that is, a silent call. Furthermore, when adjusting the amount of vibration of the vibrator, the user must reset the settings each time depending on the user's need to do so and the surrounding situation.

On the other hand, a method has also been adopted in which the vibration of the vibrator is adjusted according to the surrounding situation of the user.

This is used in places such as meetings, for example, to weaken vibrations and eliminate abnormal noises. In this case, a microphone (hereinafter referred to as a microphone) is required to detect the amount of surrounding noise, and this microphone must be mounted in a small and limited space within the receiver.

The present invention was made in view of the above problems.
An object of the present invention is to provide a wireless selective calling receiver having a sound function and a vibration function, which has a function of automatically adjusting the vibration according to surrounding conditions.

The present invention also includes: This is an attempt to achieve the above-mentioned problems in a small size.

[Means to solve the problem]

The wireless selective calling receiver according to the present invention is equipped with a vibrator installed in a part of or inside the housing, and also equipped with a microphone-cum-speaker having a sound function and a microphone function for detecting surrounding noise. An input/output switching circuit connected to the dual-purpose speaker and its drive circuit, a preamplifier circuit connected to the output terminal of the input/output switching circuit, and an A-D conversion circuit connected to the output of the preamplifier circuit. a hold circuit connected to the output of the A-D conversion circuit; a congregator circuit connected to the output of the hold circuit; the input/output switching circuit connected to the output of the congregator circuit; and a drive circuit for the vibrator. a control circuit that controls the speaker drive circuit; a first switch that connects and disconnects a sound signal from the control circuit to the speaker drive circuit; and a first switch that operates in conjunction with the first switch.

Moreover, it is characterized in that it includes a second switch that operates in the opposite direction to the first switch to connect and disconnect between the control circuit and the vibrator drive circuit.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and left-turning parts in FIG. 12 are given the same numbers. In this receiver, the received selective calling signal is detected by the radio receiving section 6, and the detected output is shaped into a square wave by the waveform shaping circuit 7. A comparing circuit 8 compares the calling number based on the square wave with the own calling number stored in the storage circuit 9. If the comparison results in a match, a match signal is output to the control circuit 22.

Upon receiving the match signal, the control circuit 22 outputs a sound signal and a vibrator drive signal. These two types of signals are linked to each other so that they operate in reverse order with the 9 function selection switches S1*S! is selected. That is, 9 aircraft,
When the power selection switch S is turned on, the sound signal is amplified by the speaker drive circuit 28 and transmitted to the input/output switching circuit 29 to cause the speaker 32 to sound. At this time, the control circuit 22 outputs a control signal to the input/output switching circuit 29 so that the input/output switching circuit 29 connects the speaker drive circuit 28 and the speaker 32.

Note that the speaker 32 has a sound collection function, that is, is a so-called microphone-cum-speaker that can also operate as a microphone. On the other hand, when the 1 function selection switch S2 is turned on to set the vibrator function, an intermittent or continuous signal is supplied to the vibrator drive circuit 14, and the vibrator 15 vibrates in a strong or weak state.

When a calling signal does not arrive, the control circuit 22 connects the input/output switching circuit 29 to the speaker 32 and the preamplifier circuit 3.
Outputs a control signal that connects 0 to 0. In this case, the ambient noise components collected by the speaker 32 are transmitted to the preamplifier circuit 3.
The signal is amplified at 0, converted from an AC signal to a DC signal by an A-D converter circuit 31, and then enters a hold circuit 27 where it is temporarily held. In the hold circuit 27, the A-
The DC signal from the D conversion circuit 31 is temporarily held and updated every time a new signal arrives. The voltage temporarily held in the hold circuit 27 enters the condenser circuit 26,
It is converted into a 1-bit or multiple-bit digital signal. This digital signal enters the control circuit 22. The control circuit 22 sends a continuous DC signal or an intermittent signal to the vibrator drive circuit 14 based on the signal output from the controller circuit 26 to digitally control the motor rotation speed of the vibrator 15. That is, when the noise detected by the speaker 32 is small.

In order to minimize abnormal noise generation, lower the motor rotation speed to weaken vibration. Note that the motor that makes up the vibrator 15 requires a large current to flow during startup, so when the vibrator is started, the control circuit 22 outputs a continuous signal for several seconds to start rotation, and after this several seconds, an intermittent signal is output. to control the rotation speed. In FIG. 1, the vibration function is selected by the function selection switch S, and the vibrator drive circuit 14 is connected to the control circuit 2.

FIG. 2 shows an embodiment of the input/output switching circuit 29 in FIG. 1. To explain it together with FIG. 1, 38 is a terminal to which the sound signal output from the speaker drive circuit 28 is input;
40 is an input terminal for an input/output control signal sent from the control circuit 22, and 40 is an output terminal for a noise signal when the speaker 32 is operating as a microphone. 35 and 37 are transfer gates, and since the inverter 36 is connected to the r-toco 5 side, the transfer gate 3
5 and 37 have opposite logical conditions.

FIG. 3 shows a timing chart of the operation of the circuit shown in FIG. 2. 41 is a sound signal entering the transfer gate 35, and 42 is an ambient noise signal when the speaker 32 operates as a microphone.

Reference numeral 43 indicates an input/output control signal T coming from the control circuit 22, which is turned off at a low level when each transfer signal is not connected to the input/output control signal TE. 44 is a waveform output to the speaker line 34, and 45 is a signal output from the noise signal output terminal 40.

In Fig. 3, the input/output control signal 4 starts at timing T1.
3 is low level, the transfer dart 35 is on, and at timing T, the input/output control signal 43 becomes high level, the transfer gate 35 is turned off, and the transfer r-) 37 is turned on. That is, the speaker 32 works as a speaker from timing T1 until the time, and the timing chart shows that it works as a microphone.

FIG. 4 is an example of the A-D conversion circuit 31 in FIG. 1. Referring also to FIG. 1, a preamplifier circuit.

The noise level amplified to a level that does not saturate at 30 is in Book A.
- input to input terminal 46 of D conversion circuit, buffer amplifier 4
After lowering the impedance through capacitive element 48.
51 and a rectifying and smoothing circuit composed of diodes 49 and 50. This DC voltage V is applied to a resistor 52 with a resistance value R□. An output voltage corresponding to the resistance value is generated at the output terminal 54. This output is output to the hold circuit 27 at the next stage.

FIG. 5 shows an example of the hold circuit 27 in FIG. This hold circuit is composed of a buffer amplifier 60, a transfer r-) 56, a capacitive element 58, and a resistor 59.

The output from the AD conversion circuit 31 is input to the input terminal 61 .

A timing signal from the control circuit 22 is input to the control input terminal 62 . The DC signal arriving at the input terminal 61 becomes conductive when the transfer dart 56 inputs the timing signal to the control input terminal 62, and is connected to the capacitive element 58 through the line 57. This capacitive element 58 holds the potential for a while until the ninth timing signal is input even if the transfer dart 56 is turned off and the input is interrupted. The DC signal is passed through a resistor 59 to a buffer amplifier 60.
ni shi, in ♂ - after lowering the dance.

The signal is output from the output terminal 55 to the constrictor circuit 26.

FIG. 6 is a timing chart showing the operation of the hold circuit shown in FIG. In Fig. 6, 63 is a DC signal, 64
is a timing signal to the control input terminal 62, and 65 is an output signal output from the output terminal 55. According to the timing signal 64 outputted at intervals T, the voltage of the DC signal is updated at each timing T1 to T4 and held until the arrival of the secondary timing signal.

FIG. 7 shows an example of the converter/4 router circuit 26 shown in FIG. Here, we will explain the case of converting the input level to 2-bit information, using two converter/4 routers 67.
8 and voltage dividing resistors 69, 70.71 (respective resistance value R
4*R5*R6) and a reference voltage source 72. The DC signal input to input terminal 66 is sent to comparator 67.
68 respectively. Comparator 67 compares the voltage of reference voltage source 72 and the DC input. Kontsu Crater 68 is.

Compare with. However, it is assumed that vA2<vA.

FIG. 8 shows a timing chart of the circuit of FIG. The constrictor operates according to the voltage of the DC inflow cuff 5, and the output '16.' shown in FIG. 8 is generated. '17 is obtained.

FIG. 9 shows an example of a control circuit, which includes a control section 78, a tokurus generation section 79 for two lungs, and an IHz nonolus generation section 80 and 10.
It is composed of an Hz nollus generating section 81, an IHz/DC switching generating section 82 capable of switching output between an IHz pulse and a direct current, an at circuit 83, and an OR circuit 84.

The operation will be explained with reference also to FIGS. 1 and 10.

The timing signal 91 is the output from the comparator circuit 8 and is connected to the terminal 85.
The control section 78 is then entered. In FIG. 10, the timing signal 91 indicates that the own calling number has been received at time t.
It's low level.

The timing signal 92 is a signal sent from the control section 78 to the input/output switching circuit 29 through the terminal 87.

Switch between microphone operation and swivel operation.

Here, before time t at 9, speaker 3 is at low level.
2 is operated as a microphone, and after 1 time t1, the speaker 32 is operated as a speaker at a high level.

The timing signal 93 is a signal sent from the terminal 89 to the vibrator drive circuit engineer 4, and starts outputting at time t1 when the calling numbers match. In FIG. 10, from time t1 to t! for the reason mentioned above. Up to IHz/DO switching generator 8
2. Send as many continuous signals as necessary to start the vibrator (
power) is applied.

After the vibration has started and stabilized, the 10 Hz)4 pulse generator 81 generates an intermittent signal from time t2 onward to soften the vibration and reduce power consumption.

The timing signal 94 is a signal outputted from the terminal 88 to output a sound, and has a frequency of 2 kHz and 1 kHz. The AND signal of the signal is sent to the speaker drive circuit 28 and the 1
Output starts from time t.

A timing signal 95 indicates an output signal of the constrictor circuit 26 obtained by detecting ambient noise.

It is input through terminal 86. At time t1, the vibrator is at a low level, that is, the surroundings are quiet, so the vibration of the vibrator is intermittent after activation to weaken the vibration, prevent abnormal noise, and reduce power consumption. In the figure, "H" indicates that the receiver is in an environment where there is a lot of ambient noise and the vibration increases.

“L# indicates that you are in an environment where there is little ambient noise and vibrations should be reduced.

〔Effect of the invention〕

As explained above, the present invention uses a sounding speaker mounted on the surface or inside of the casing of a wireless selective calling receiver as a microphone.

Ambient noise can be detected without using the limited space inside a small receiver. 2) By operating the vibrator intermittently in response to the level of ambient noise, the strength of the vibration is automatically controlled, reducing power consumption and extending the life of the limited small capacity battery. It becomes possible. Furthermore, by controlling the strength of vibration, it is possible to reduce abnormal noise generated from the wrinkle vibrator and the occurrence of abnormalities due to resonance with surrounding parts.

[Brief explanation of the drawing]

Figure 1 shows a block diagram of a receiver according to the present invention, and Figure 2 shows an example of the input/output switching circuit shown in Figure 1. Figure 3 is a time chart for explaining the operation of the input/output switching circuit in Figure 2, Figure 4 shows an example of the A-D conversion circuit in Figure 1, and Figure 5 shows the hold circuit in Figure 1. 6 is a timing chart for explaining the operation of the hold circuit in FIG. 5, FIG. 7 is an example of the comparator circuit in FIG. 1, and FIG. 8 is a timing chart for explaining the operation of the hold circuit in FIG. 7. 9 shows an example of the control circuit of FIG. 1, and FIG. 10 shows a timing chart for explaining the operation of the control circuit of FIG.
11 is a timing chart for explaining the operation of the control circuit shown in FIG. 11. FIG. 11 is an external view of a conventional receiver having a vibrator function and a sound function, with the vibrator being shown through. FIG. 12 is a block diagram of the receiver shown in FIG.
FIG. 13 is an external view showing the structure of the vibrator. S,,S,...Function selection switch, TGl, TG,
...Transfer gate, 47.60...Buffer amplifier, 67.68...Conno mother regulator. Figure 2 1112 Time Figure 8

Claims (1)

[Claims] 1. In a wireless selective calling receiver having a sound function and a vibration function using a vibrator, the vibrator is mounted in a part of or inside the housing, and the sound function and a microphone function for detecting surrounding noise are installed. an input/output switching circuit connected to the microphone/speaker and its drive circuit; a preamplifier circuit connected to the output terminal of the input/output switching circuit; and an output of the preamplifier circuit. an A-D conversion circuit connected to the A-D conversion circuit; a hold circuit connected to the output of the A-D conversion circuit; a comparator circuit connected to the output of the hold circuit; a control circuit that controls a vibrator drive circuit; a first switch that disconnects and disconnects a sound signal from the control circuit to the speaker drive circuit; a second switch that operates to connect and disconnect between the control circuit and the vibrator drive circuit.