SU1045355A1 - Pulse generator - Google Patents

Abstract

A PULSE GENERATOR containing a transistor equivalent of a two-base diode, a time setting RC circuit, the midpoint of which is connected to a control electrode of a transistor equivalent, a two-base diode, characterized in that, to improve speed, the time resistor of the setting RC circuit is connected to the second base of a transistor RC circuit two-base diode. (L s 4 ;: U1 00 SP ate

Description

The invention relates to pulsed technology and can be used in automation devices and computer technology "

A known pulse generator containing 5 integrating RC-stump connected between the buses of the power source, p- + 1-p-transistor connected by the emitter to the output of the RC circuit, and the base to the resistive voltage divider and collector of the first -p- and -transistor, the base of which is connected to the collector of the transistor p_c-p ~, and the second p-p-i-transistor, the emitter of which is connected to the common bus, the collector through the resistor to the base, and the 15 base to the emitter of the first hp -and-transistor connected through a resistor to a common bus E1].

However, this generator is complex and has a small amplitude of the output signal 20, equal to the output voltage of the resistive divider and limited from above by the permissible value of the reverse voltage at the base-emitter p-1’1-p-transistor transition. In addition, the frequency of 25 generated pulses in it is low due to strong saturation and the absence of active blocking of the secondary transistor, since for normal operation of the generator it is necessary that the closing of the secondary second transistor occurs with a delay relative to overturning moment of the circuit.

The specified delay is determined by the time the saturation and closing of the transistor exit, “varies widely depending on operating conditions and changes in the parameters of circuit elements within technological tolerances and, under certain conditions, limits the frequency of the generated pulses, which is also a disadvantage of the known generator.

Closest to the proposed technical essence, 45 is a generator containing a transistor equivalent of a two-base diode and a timing RC circuit, the middle point of which is connected to the control electrode of a transistor-5 "equivalent of a two-base diode, and a timing resistor / D - circuit is connected to power bus E * then

A disadvantage of the known generator is the low speed associated with the fact that the discharge of the capacitor of the timing RC circuit occurs through the control electrode of the transistor equivalent of a two-base diode.

The purpose of the invention is to increase the speed of the generator.

This goal is achieved by the fact that in a pulse generator containing a transistor equivalent of a two-base diode and a timing RC circuit, the middle point of which is connected to the control electrode of a transistor equivalent of a two-base diode, a resistor of a timing-response SN circuit is connected to the second base of the transistor equivalent of a two-base diode.

The drawing shows a diagram of a pulse generator.

The generator contains a transistor equivalent of a two-base diode 1, having a control electrode 2 and a second base 3, a timing RC circuit 4 with a resistor 5, a power bus 6 and a common bus 7. The midpoint of the time-delaying C-circuit 4 is connected to the control electrode 2 of the transistor equivalent of a two-base diode 1, the resistor 5 of the timing RC circuit 4 is connected to the second base of the 3'2-base diode 1.

The pulse generator operates as follows.

When the supply voltage to the bus, both transistors are closed due to lack of voltage at the midpoint of the timing RC circuit 4. The capacitor of the timing CS circuit 4 is charged from the power source. When the voltage on it reaches a threshold value, the transistors begin to open. The regenerative process of overturning the generator. Next, a capacitor discharge occurs, including RC circuits through transistors and a resistor 5 of the RC timing circuit 4. In this case, the resistor 5 of the RC timing circuit 4 is connected in parallel to the capacitor of the RC timing circuit 4 through the second base of the transistor equivalent of a two-base diode 1, which allows to speed up the process discharge capacitor, reduce the pulse duration and thereby increase the speed of the proposed generator.

After the discharge of the capacitor, the circuit overturns to its original state.

Tirach <936 Subscribed

Branch of PPP Patent ”

Uzhhorod, st. Project, 4

Claims (1)

A PULSE GENERATOR containing a transistor equivalent of a double-base diode, a timing RC-type, the middle point of which is connected to a control electrode of a transistor equivalent of a double-base diode, characterized in that, in order to increase the speed, the resistor of the timing-of-charge circuit is connected to the second base of the transistor equivalent of a double-base diode.