SU367534A1 - POWER VOLTAGE GENERATOR - Google Patents

Description

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The invention relates to the field of pulse technology, namely to sawtooth generators, and can be used in indicator devices.

Known sawtooth generators are known that contain an amplifier on a transistor connected in a circuit with a common emitter, between the collector and the base of which an integrating capacitor is connected, and an electronic switch on the transistor. The disadvantage of the known devices is that they do not have the required return time .. „;

The aim of the invention is to reduce the return time.

This is achieved by the fact that the collector of the transistor of the electronic key of the device is connected to the collector of the amplifier, and its emitter is grounded.

The drawing shows the block diagram of the proposed generator. It contains an amplifier / transistor, an electronic switch 2 on the transistor, a load resistance 3, a feedback resistance 4, an integrating capacitor 5, a discharge diode 6, a control voltage source 7, a sawtooth voltage consumer 8.

When a negative voltage is applied to the input of the electronic key 2, the collector and emitter of the electronic key transistor can be considered open. At the base of the transistor amplifier / at the same time fed through the discharge diode 6 blocking voltage; 0b + -1.5 volts. Transistor f / i

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Unit 1 is locked at the same time, and the voltage on its manifold is close to the supply voltage -} - U power. In this case, the integrating capacitor 5 is charged to a value (+ t / power and,).

When an electronic switch 2 is supplied to the input of a Uyap pulsed control voltage, the transistor of the electronic key opens to a positive level of the Lynp control voltage during the reversal of the sawtooth voltage. In this case, a significant reduction in the discharge time of the integrating capacitor 5 has been achieved in the device, since it is discharged through the electronic switch 2 and the discharge diode 6, the resistance of which is insignificant at this time.

When the electronic key 2 is locked with a negative level of control voltage (during the forward stroke of the sawtooth voltage), the voltage on the collector of the transistor of amplifier 1 increases linearly as the feedback circuit, consisting of the integrating capacitor 5 and resistance 4, ALARMED to the source; -10 to ± -300,

Nick voltage -f /;

lock up

discharge diode 6 is locked. Further work cycle

sawtooth generator; different voltage repeated.

Subject matter

A sawtooth generator, containing an amplifier in a transistor connected in a tno circuit with a common emitter, between

the collector and oasis of which is included an integrating capacitor, and an electronic switch on the transistor, characterized in that, in order to reduce the return time, the collector of the transistor of said electronic key is connected to the amplifier's collector and its emitter is grounded bottom diode.

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