SU391713A1 - BLOCKING GENERATOR - Google Patents

Description

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The invention relates to a pulse technique and can be used when measuring time intervals, to create a time scale on an oscilloscope screen, when checking the operation of counting machines.

The well-known blocking oscillator on a transistor with a transformer-collector-base connection and emitter time is given to it, RCceio has a narrow functionality.

The purpose of the invention is to obtain the possibility of superheating imiuls series, the duration of which is equal to the duration of the control pulses, with the coincidence of the first pulse of the series with the front edge of the control impulse at any duty cycle of the control pulses. For this, the collector of the transistor blocking oscillator is connected via a diode and a capacitor of the differentiating RC-chain to the point of connection of the emitter resistor that specifies the RC-price to the input terminal of the control pulse source.

FIG. 1 shows a diagram of the proposed transistor blocking generator; in fig. 2 - diagrams of impulse voltages.

The proposed blocking generator includes a well-known transistor blocking generator with a collector-base connection, containing a transistor 1, an impulse transformer 2, an emitter time driving circuit from capacitor 3 and resistor 4. The control signal source 5 is connected to the emitter resistor 4 and a differentiating capacitor 6 connected to a resistor 7 and a diode 8 connected by a cathode to the collector of the transistor.

Position 9 marked the output of the transistor blocking generator.

Before posting a positive control impulse (Fig. 2a), the output level of the signal source is negative, as a result of which the emitter-base transition of the transistor / is not generated and no generation occurs.

When a positive control pulse arrives, the voltage applied to the resistor of the driver circuit (capacitor 3 and resistor 4) becomes positive and the blocking generator is switched to self-oscillation mode (Fig. 26).

A short positive impulse received by differentiation of the control signal SigCpl arriving at the collector of the transistor / opens the transistor / even in the case when the time driving the capacitor 3 of the blocking generator did not have time to discharge, and the first pulse of the serk is generated. At the moment of termination of the control pulse, the emitter-base junction of the transistor J is closed again and the generation is interrupted.

Thus, the proposed blocking generator eliminates a burst of pulses, the duration of which is the duration of the control pulse (Fig. 2a, b).

Subject invention

Blocking oscillator on a transistor with a collector-collector-base connection and emitter time setting an RC value, characterized by the fact that, in order to generate pulse series whose duration is equal to the duration of the control pulses, the first pulse of the series with the leading front of the control at any duty cycle of control pulses, the collector of the transistor blocking oscillator through the diode and the capacitor of the differentiating RC-chain is connected to the junction point of the emitter resistor source terminal of control pulses.

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