SU661736A1 - Driven multivibrator - Google Patents

Description

(54) WAITING MULTI-VIBRATOR.

one

The invention relates to a pulse technique, and more specifically to a hush, multivibrator, and can be used in automation, electric drive and electrical measuring equipment.

Known multivibrators on emitter-coupled transistors are known, which contain a power source, an additional transistor of the opposite conductivity 1.

Known multivibrators are known, comprising emitter-coupled transistors, a time setting capacitor, an additional transistor, a power source, and a diode 2.

These multivibrators do not provide automatic generation of pulses, the duration of which is inversely proportional to the voltage of the power source.

The aim of the invention is to expand the functionality.

This is achieved by the fact that in a standby multivibrator containing the first and second transistors with an emitter coupling, the time specifies a capacitor, an additional transistor, a power source, a diode, resistors,

A parametric voltage regulator is introduced, to the negative of which the collectors of the first, second, and additional transistors are connected via a resistor, the emitter of the additional transistor is connected to the plate of the time of the driving capacitor, which is connected via a diode to the base of the second transistor, and the additional transistor is connected to the negative power supply bus.

The drawing shows a schematic diagram of the device.

The standby multivibrator contains the first 1 and second 2 transistors, the time setting capacitor 3, the additional transistor 4, the power source 5, the diode 6, the resistors 7-15, the parametric voltage regulator on the resistor 16 and the zener diode 17.

Multivibrator works as follows.

Transistor 1 is in the initial state before the arrival of the triggering pulse at the input is locked, and transistor 2 is open. The capacitor 3 is charged before the voltage of the parametric stabilizer. The initial voltage on the K-sensor when the power supply is changed from the minimum to maximum value remains constant. After driving the negative trigger pulse to the input, transistor I becomes saturated, and transistor 2 closes. The capacitor 3 is discharged through the intrinsic resistance of the transistor 4. When the voltage across the capacitor reaches a value of 3, approximately equal to the zero level, the multivibrator back tilts. With the appropriate selection of the capacitor 3 capacitance and the divider value, the additional transistor base is the higher the supply voltage, the more open the transistor 4 and the smaller the discharge resistance for the initial voltage on the capacitor 3 and the shorter the pulse and, conversely, the lower the voltage power supply, the less open the transistor 4, i.e., the greater the discharge resistance for the initial voltage across the capacitor 3 and the longer the pulse. One of the possible applications of the proposed standby multivibrator is in the electric drive of a portable self-recording device, namely, in the control circuit of a pulse motor for drawing diag. S

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Claims (2)

 exit frame paper carrier recording information. An inventive multivibrator comprising first and second emitter-coupled transistors, a time setting capacitor, an additional transistor, a power source, a diode, resistors, characterized in that, in order to extend the functionality, a parametric voltage stabilizer is introduced to the negative pinch the collectors of the first, second and additional transistors are connected through a resistor, the emitter of the additional transistor is connected to the plate of the time of the driving capacitor, and the base is th trapzistora through a variable resistor connected to the negative spike pita1P1 source. Sources of information taken into account during the examination 1. USSR author's certificate No. 323852, H 03 K 3/284, 04.01.70. 2. Author's certificate of the USSR .NO 226674, P 03 K 3/295, 04.11.68.