SU144230A1 - A method for converting small dc voltages into dc pulses - Google Patents

Description

Methods are known for converting small dc voltages into dc pulses. Devices for performing izvsnyh methods have the disadvantage that when high sensitivity their input impedance is small, or at high input impedance the sensitivity of the device is small.

The described method of converting small voltages into current pulses allows the use of devices with high input readiness and a sufficiently high sensitivity. The skeletal device according to the described method is shown in the drawing.

Low DC voltage is applied to the / - / terminals. Through the contacts of the vibrating converter 2, to the magnitude of this voltage, the charge is a capacitor, which periodically discharges into a cutter circuit containing inductance 4 and a 5-volt condenser, which oscillate and amplify. To increase the sensitivity of the device, the amplifier 6 can be: frequency-selective. The amplified voltage from the amplifier 6 is fed to a non-linear quadrupole containing capacitors 7, 8, resistances 9, 10, 11 and 12 and diodes 13 and 14. At the output of the non-linear quadrupole (terminals 15), pulses of constant voltage (current) the amplitude of which linearly depends on the amplitude of the input voltage, and the polarity coincides with the polarity of the input voltage. The process of converting alternating voltage to damped oscillations and DC pulses is as follows. Depending on the polarity of the voltage of the damped oscillations acting at the input of the nonlinear quadripole, one of the capacitors, for example, 7, is charged before the other (capacitor 8}. for the second half-wave. The discharge of on-capacitors occurs simultaneously

in the same direction. Thus, the output voltage is the voltage difference between capacitors 7 and 8, and the polarity of the output voltage pulse depends on the polarity of the first half-wave of damped oscillations acting at the input of the quadrupole. In turn, the polarity of the first half-wave of the damped voltage depends on the polarity of the input signal acting on / - /. If the polarity of the input signal changes, then the first capacitor 8 charges, and the second capacitor 7. The polarity of the output voltage at the terminals / 5 also changes. Thus, the non-linear quadrupole acts as a polarity converter.

The described method can be used in compensation measuring devices.

PRA D EMISSION ABOUT

A method of converting low voltage voltages into DC pulses, which is due to the fact that, in order to increase the input impedance of the converter and increase the sensitivity of the DC amplifier, the input voltage of the DC current is periodically connected to the tanks, then the tank is discharged to the LC circuit. and the damped oscillations obtained on the contour are amplified and transformed into pulses, the polarity of which depends on the sign of the input signal using a nonlinear quadrupole.

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