SU424088A1 - DIGITAL MEASURING DURATION OF PULSES - Google Patents

Description

one

The invention relates to the field of digital, electronic technology.

There are known digital meters of duration, I. m | pulses, containing capacitive charge-discharge spreads, the output pulse of which, through a coincidence circuit, controls the number of measurement pulses fed to a digital counter. The drag circuit is controlled by a discharge and measurement generator, which is its disadvantage.

To simplify the circuit of the proposed device, the reiHepBTOp of measuring impulses in it is connected to the discharge of the spreader circuit, and the output of the PACS1 connector is connected to the input of the counter.

The scheme of the device being described is shown in the drawing.

Measured AND (the miouls apply to the input 1 of the charge-discharge diode of the expander 2, the charge circuit of which consists of transistor 3, capacitance 4, diode 5 and power supply 6, and the discharge circuit of transistors 7, 8 and capacitance 4. The discharge transistor 8 is connected with the generator 9 measuring pulses through the transformer 10 and the resistance 11. The load 12 of the discharge transistor 7 is connected to the meter 13.

The device works as follows.

The measured im1p | pulse produces the charge of the capacitor 4 of the expander 2 from the source 6 through

a transistor 3, a voltage generator with a dc generator, p dnod 5. The voltage across the capacitor 4 rises linearly to a value proportional to the duration of the measured voltage.

Measuring pulses are fed from the generator 9 to the emitter-base of the transistor 8 through the transformer 10 and the resistance 11.

In the initial state, when the capacitance 4 is not charged, the voltage on pei is kept close to zero for. the count of the discharge of the contactor TOiKOM transistor 8. In this case, the transistor 8 is in saturation mode, and its collector current will be a small fraction of the emulator.

The pulses of the collector current of the resistor 7, whose transition of the emitter-bava is included in the discharge rate, will in this case also be insignificant.

In the case when the capacity is charged, the control panel is saved to the next bit of the pulse. The discharge nmnuli are penetrated by a LiiPa-step-like discharge of Helicity 4 by the collector current of the trawler 8. The series of discharge current pulses passes through the base-emitter junction of transistor 7, due to which on the load 12 in its collector value the corresponding series of pulses

voltage, which is transmitted directly to the input of the counter, 13.

Subject invention

A digital pulse duration meter containing capacitive charge-discharge and expansion; a detector, a generator of measuring pulses, and a counter, characterized in that, in order to simplify the circuit, the generator from the meters (CO) test is connected inductively (p d1noy tsepnyi rash-yritel, whose output is connected to the input of the counter.

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