SU976481A1 - Multivibrator - Google Patents

Description

(5) MULTI-VIBRATOR

one

The invention relates to a pulse technique and can be used in devices requiring adjustment of the duration and frequency of pulses over a wide range, for example in metering devices.

Known multivibrator containing a transistor, two inverters and a JC circuit with a large range (Shut off by the duration of the pulses of r.

The disadvantage of it is hard excitation and asymmetrical output waveforms.

The closest in technical essence to the present invention is a multivibrator containing a time driving RC circuit, an RS flip-flop, two inverters and a capacitor.

However, the known multivibrator has a small range of adjustment of the duration and frequency of the generated pulses.

The purpose of the invention is to increase the frequency control range and the length -. output pulses.

This is achieved by the fact that a multivibrator containing two inverters, two capacitors, a first resistor and an RS flip-flop, the outputs of which are connected to the inputs of the inverters, have a second resistor and two transistors, the emitter, whose terminals are connected and connected to the common bus, The collectors are connected respectively to the R and S inputs of the trigger, and the bases through the resistors are connected to the outputs of the inverters and through 5 capacitors to the direct and inverse outputs of the RS flip-flop, and composite transistors are included as transistors.

20 The drawing is a schematic diagram of the multivibrator. . ;

It consists of RS-flip-flop 1, transistors 2 and 3;

Claims (2)

Claim 1. A multivibrator containing two inverters, two capacitors, a first resistor and an RS-flip-flop, the outputs of which are connected to the inverters inputs, characterized in that, in order to increase the frequency control range and the duration of the output pulses, a second resistor and two transistors are introduced into it The emitters 2 of which are combined and connected to a common bus, the collectors are connected respectively to the R and S inputs of the trigger, and the bases are connected through resistors to the outputs of the inverters and through capacitors to the direct and inverse outputs of the RS trigger. 2. The multivibrator according to claim 1, characterized in that it includes composite transistors as transistors.