SU632057A1 - Controlled one-shot multivibrator - Google Patents

Description

one

The invention relates to a pulse technique and can be used as a generator of square pulses in various electronic devices and in particular in servo systems.

A controlled one-shot 1 is known, containing two transistors, the emitters of which are interconnected and through a resistor with the power supply thickness, and the collectors are connected to each other via resistors; The power supply bus, the base of the first transistor is connected via resistors to the power supply buses, and the base of the second transistor is connected to the collector of the first transistor and directly to the collector of the control transistor, the emitter of which is connected to the power supply bus.

However, the known one-shot has an insufficiently wide range of output pulse durations.

The purpose of the invention is to expand the range of output pulse durations by achieving a second diode with a controlled one-shot containing two transistors, a resistor, a power source, a capacitor and a diode, the anode of which is connected to the control signal source bus and the base of the control transistor and the cathode of the first diode, the anode of which is connected to the collector of the input transistor.

The drawing shows a general electrical circuit of an adjustable one-shot.

The single-oscillator contains transistors 1, 2, control transistor 3, connected according to the emitter follower circuit, since its emitter includes a resistor 4, a capacitor 5, a resistor 6, which is the collector load of the normally open transistor 1, a resistor 7 connected to the collector circuit normally closed transistor 2, diodes 8, 9, the outputs of which are connected to the base of transistor 3, the first input (the anode of the diode 8) to the source of the control voltage or current, and the second input (the anode of the diode 9) to the collector m of the transistor 1. In addition, there are also chains.

start and power one-shot.

In the initial state, the transistor 2 is closed, the transistors 1, 3 are open, and the transistor 1 is in the saturation mode. Transistor 3 is open due to the fall of the voltage; e,:,., ..:

  . -,., Ch .-. .6.32057 4i-v a

; - NII on resistor 6. Diode 9 is open, and diode 8 is closed, since the voltage on its cathode is more positive than on the anode. The open state of the transistor 3 provides the base current necessary to saturate the transistor 1. The time setting capacitor 5 is charged before the voltage of the EP (minus the voltage drop across the emitter resistance of the one-shot). A positive triggering pulse, affecting the base of transistor 1, shuts it down for the entire time of recharging capacitor 5 (for the duration of the working stroke). In this case, the diode 9 is closed, and the diode 8 is opened. The control voltage or current through the diode 8 is supplied to the base of the transistor 3, the collector current of which provides the discharge of the capacitor 5. After the end of the working stroke, the circuit returns to its original state. Thus, in the initial state in the considered single-oscillator, the transistor 3 is terminated through diode 9, and the control | 1airing is fed to it through another diode 8 and only for the duration of its working stroke. The magnitude of the controlling eg / xpi in the one-shot does not affect the saturation level of the normally open transistor 3, and, consequently, the parameters of the one-shot. A single vibrator has a wider range of lengths (; flax. Output pulses

Claims (1)

4 and allows the impact of the control-voltage of the voltage on the parameter meters of the co-vibrator to be arranged. This broadens the field of application of a controlled one-shot and) strap and the need to develop ric; .u) () iit.) Ix devices with adjustable output time, -). Claims of the invention A controlled one-shot, containing two transistors, the emitters of which are connected to each other and through a resistor with a iiiii power source, and the countors through the resistors are connected to another power source, the base of the first transistor is connected to Itan, and the base of the second transistor through the co-sensor - with to () L, 1.ch.g.- .; the first transistor and directly: about with the collector of the control of the tor1: -: history ::. The emitter is through a resistor with a source of 1 Tani. i.) .Ul.- .. characterized in that, with ii. iHCui; -: i they range: 5he durations of output.ch. impulses, a second .anod is introduced into it, g ..: lf between the nstochnoy length; ka ii;) jii; /:. :: iyonnogo; 1a and the control base; Tr; -.;: A transistor connected through the first diol; collector of the second transistor. Sources of information taken into account in the examination: 1. USSR Copyright Certificate No. 226674, cl. P 03 K 3/284, 1967.