SU864143A1 - Device for automatic time shift of gate pulses - Google Patents

Description

one

This invention relates to an electrical measuring technique and can be used in stroboscopic x-ray oscillographs.

An auto-shift device is known comprising fast and slow sawtooth voltage generators and a comparator ij.

The disadvantage of this device is the dependence of the accuracy of mounting the buckle on the value of the stretch factor.

The closest to the invention to the technical essence is a device for automatic time shifting of gating pulses, comprising a synchronization unit, the input of which is connected to the synchronization signal bus, and the output is connected to the starting input of the fast sawtooth generator, the output of which is connected to the first input of the comparator, the second the input of a slow sawtooth voltage connected to the output of the divider; the first input of which is connected to the first output of the slow sawtooth voltage generator,. G23 hanger potentiometer.

The disadvantage of this device is the dependence of the accuracy of setting the delay on the value of the stretch factor.

The purpose of the invention is to reduce the error of time measurements, regardless of the stretch factor.

To achieve this goal, a device for automatically temporarily shifting gating pulses, comprising a synchronization unit,

The input to which is connected to the wide synchronization signal, and the output to the start input of the fast sawtooth generator, the output of which is connected to the first input of the comparator, the second input connected to the output of the slow saw voltage divider, the first input of which is connected to the first output of the generator slow sawtooth,

20 and a delay potentiometer is equipped with an initial delay potentiometer and a switch, the first input of which is connected to the second output of the slow sawtooth generator 25, the second input to the output of the delay potentiometer, and the output to the second input of a slow sawtooth divider, and the output of the initial delay potentiometer 30 Connected to the third input of the comparator.

The structural electrical diagram of the device is presented on the chart.

The device consists of a synchronization unit 1, a fast sawtooth generator (BPN), a comparator 3, a slow sawtooth voltage divider 4 (MPN), a 5 MPN generator, a potentiometer 6, a delay, a switch 7, and a potentiometer 8 of the initial delay.

The device works as follows.

The synchronization input signal is fed to the input of the synchronization unit 1. A phase-locked and shape-standardized output of the synchronization unit 1 triggers the BPN generator 2. From the output of the generator 2, a fast sawtooth voltage is applied to the first input of the comparator 3.

During the first sweep cycle specified by the generator 5 MPN, the switch 7, and the comparator 3 comprehend MPN, passed through the divider MPN 4 and the voltage from the potentiometer 8 of the initial delay. During the second sweep cycle, the cutout switch 7 is open, and the comparator 3, in addition to the two voltages, also receives a voltage from the delay potentiometer 6 that passes through a 4 MPN divider. Thus, on the screen of a CRT, two signals are observed, spaced apart from each other in time by an amount depending on the position of the slider of the potentiometer 6 delay and on the stretch factor depending on the MPN divider. . ,

The voltage arriving from the delay delay potentiometer B is attenuated by the divider and 4 MPN by the same amount, BQ as attenuated by the MPN, the formula alphemo - rjeHepATopoM-MnH. Therefore, the top section of the delay delay potentiometer scale, which determines the measurement error,. does not depend on the value of the stretch factor, and therefore the error of the time measurements introduced by the potentiometer b delay, is equal to the measurement of non-swept measurements when the division factor of the divider is equal to one.

The error of time measurements for lnmbu of a multi-turn potentiometer of the delay meter does not depend on the value of the stretch factor and has a minimum value depending on the resolution (discreteness) of the potentiometer limb and the corresponding unstretched sweep.

Claims (2)

Invention Formula A device for automatic 5 time shifting of gating pulses, a synchronization block containing an input connected to a synchronization signal bus, and an output to a trigger input of a fast 0 sawtooth voltage generator whose output 1 is connected to the first comparator input and a second input connected to the divider output A slow sawtooth voltage, the first input 5 of which is connected to the first output of the slow sawtooth voltage generator, and a delay potentiometer, different in that, in order to reduce errors of time measurements, regardless of the stretch factor, it is equipped with an initial delay potentiometer and a switch, the first input of which is connected to the second output of the slow sawtooth generator, the second input to the output of the delay potentiometer, and the output of the slow sawtooth divider voltage, with the output potential of the initial delay 40 is connected to the third input of the comparator. Sources of information taken into account in the examination 1. Technical description of the oscilloscope C7-9, 1978. 4J 2. Description of block 1818 A of the company Hewlett-Packard. IT, catalog of the company, 1978 (prototype).