SU1334367A1 - Flip-flop former - Google Patents

Abstract

The invention relates to a pulse technique, in particular to devices with several stable states. The aim of the invention is to expand the range of adjustment of the switch-on threshold, as well as to increase the stability of the trigger threshold and the trigger speed. The trigger contains transistors 1 and 7 of the first conductivity type, current reflector 10 on transistors of the second conductivity type, as well as the resistors shown in the drawing. The trigger speed is increased due to the fact that only one transistor is in the saturated state, and the second transistor and the current reflector 10 are in active mode. The extension of the adjustment range of the on threshold is achieved by the fact that the on voltage is determined by a divider on the resistors 5 and 6 and can be controlled practically from zero to the output voltage in the off state. Adjustment can be made by changing the magnitude of resistor 6. 1 sludge. (L 00 00: 00 05

Description

The invention relates to a pulse technique, namely, devices with several stable states.

The purpose of the invention is to expand the range of adjustment of the turn-on threshold, increase the stability of the response threshold, and speed.

The drawing shows a schematic diagram of a trigger driver. The voltage becomes less than this

quantities then decreases

the current of transistor 1 through the current reflector 10 to the base of transistor 7, which leads to the output of the last of the Trigger generator, contains the first first transistor 1 of the first conductivity type, the base of which is connected to input 2 and through the first resistor 3 to the common bus. Its emitter is through the neck - 15 scheni. This leads to an increase in the residual resistor 5 connected to the output 4 of the potential at the output 4 of the device. and through the second resistor 6 - with the general Emerging avalanche process by the bus and the emitter of the second transistor, closing the transistors 1 and 7 leads 7 of the first conductivity type. The collector of the transistor 1 is connected through the fourth 20th resistor 8 with the input terminal 9 of the current reflector 10 on the transistor

The device is reset.

An increase in the speed of the trigger-former is achieved due to the fact that in the end state it is at. There is only one transistor, and the second transistor and current reflector

the second type of conductivity, the common pin 11 of which is connected to the bus 12

power, and output pin 13 - with a 25-work in active mode.

ZOY of the transistor 7 and through the third resistor 14 - with a common bus. The collector of the transistor 7 is connected to the output 4 of the device and through the fifth resistor 15 to the bus 12,

Trigger driver works. in the following way.

In the initial state, when the input signal is zero, transistors 1 and 7 are closed, and at output 4 of the device, it is a high level. When a positive voltage device that supplies the emitter transistor 1 to the input 2 is applied to the opening threshold of the transistor 1, the latter opens slightly, its collector current through the input terminal 9 and the common terminal 11 of the current reflector 10 causes current to appear at the output terminal 13, which , flowed through the base of transistor 7, causes its opening.

The arising current of the collector of transistor 7 leads to a decrease in the potential at the output 4 of the device, and consequently, to a decrease in the voltage at the emitter of transistor 1. This leads to an even greater opening of the transistor 1. As a result, the output current of the reflector 10 k is increased 7, which leads to an avalanche-like process of switching the device to another steady state, in which transistors 1 and 7 are open, on

output 4 of the device - low potential.

This state of the device is maintained as long as the input voltage of the device is sufficient for current to flow through the current mirror, greater than the base current of the transistor 7. If the output

the current of the transistor 1 through the current reflector 10 to the base of the transistor 7, which leads to the output of the latter from saturation. This leads to an increase in the potential at the output 4 of the device. The emerging avalanche-like process of closing transistors 1 and 7 drives

scheni This leads to an increase in the potential at the output 4 of the device. The emerging avalanche-like process of closing transistors 1 and 7 drives

The device is reset.

Increasing the speed of the trigger transformer is achieved due to the fact that only one transistor is in the fixed state, and the second transistor and the current reflector are

35 pa 6.

The extension of the adjustment range of the switching-on trigger trigger voltage is achieved due to the fact that the switching-on voltage is determined by a divider on resistors 5 and 6 and can be adjusted practically from zero to the output voltage in the off state. Adjustment can be made by varying the value of resistor 6.

Claims (1)

Formula formula Trigger driver containing 40, the first and second transistors of the first conductivity type, six resistors, the base of the first transistor is connected to the trigger input of the former and the transistor. the first resistor is connected to the common bus; the emitter is connected to the common bus and the emitter of the second transistor through the second resistor; the base of the second transistor is connected to the common bus through a third resistor, the collector 5Q of the first transistor is connected to the first output of the fourth resistor, the collector of the second transistor is connected to the output of the trigger generator and the first output of the fifth resistor, which is 555 in order to expand the threshold adjustment range, increase the stability of the response threshold and speed, a reflector is inserted into it 31334367 current of the second type transistor by the output of the fourth resistor, and the output, the common output of which is the input output — is connected to the base of the second transistor to the power supply bus and the second resistor, whose collector is connected by the water of the fifth resistor; the water emitter current reflector is connected to the second of the first transistor.