SU957418A1 - Pulse generator - Google Patents

Description

5) PULSE GENERATOR

one

The invention relates to a pulse technique and is intended to generate clock pulses.

A device for generating clock pulses, comprising a diode thyristor connected in series with a resistor to a constant voltage source, is known. Parallel to the diode thyristor, a circuit of a series-connected resistor and a master Q driver are included.

The disadvantage of the device is its temperature instability, which is explained by the dependence of the switching voltage of the diode thyristor on j temperature.

Closest to the present invention is a pulse generator containing a thyristor, to which a switching circuit connected by a switching capacitor and a choke is connected, a load connected by one terminal to the power supply and another to a switching circuit and a cathode to the control electrode of the thyristor , and the anode by the time of the master RC circuit 2,

A disadvantage of the known pulse generator is the low reliability and frequency stability determined by the temperature instability of the characteristics of the semiconductor element (dynistor) 14 by the low reliability of this four-layer semiconductor device.

The purpose of the invention is to increase the reliability and stability of the pulse frequency.

The goal is achieved by the fact that in a Pulse Generator containing a thyristor, the anode of which is connected to the positive power supply bus and one capacitor plate, the second capacitor plate is black & The choke is connected to the cathode Ti3. 9 resistors, a series RC circuit, a load connected by one output to a negative power supply bus, the thyristor cathode is connected through an injected diode to the junction point of a resistor and an RC circuit capacitor, the other terminals of which are connected to the thyristor control electrode and the negative one to the output of the power source, the second output of the load is connected to the second plate of the capacitor. The electrical circuit diagram of the generator is shown in the drawing. The generator contains a thyristor 1, a capacitor 2, a choke 3, a load 4, a power source 5, a diode 6, an RC circuit from a resistor 7 and a capacitor 8. The generator works as follows. In the initial state, the thyristor 1 is locked and oscillating occurs behind the row of capacitor 2 and capacitor 8 from power supply 5 via droplet 3 and diode 6. At the same time, capacitor 2 is also charged through the heating circuit and the charging circuit. and 8, the capacitor 8 is charged by the energy accumulated in choke 3. Then the capacitor 8 is discharged to the load through a resistor 7, a control electrode of the thyristor 1 and a choke 3. The thyristor 1 is unlocked, and the voltage of the source is applied to the choke 3 and load. The current in their circuit increases. At the same time, the voltage on the capacitor 8 is fixed at the voltage level of source 5, and the capacitor 2 is recharged through the thyristor 1 and the choke 3 to reverse polarity. After the window of this recharge, the recharging of the capacitor 2 begins to the original polarity. In this case, the torus 1 is locked by a reverse voltage applied from capacitor 2, and capacitor 2 is recharged along load circuit 4 and along circuit: choke 3, diode 6, capacitor 8. Since the voltage on capacitor 2 is. The sum of the voltage of the power source 5 exceeds the voltage on the condenser 84 of the saturation 8, which by this moment is equal to the voltage of the source 5, then the dosing of the capacitor 8 to a voltage higher than the voltage occurs. source 5. When the process of dosing is completed, the discharge of capacitor 8 to the load begins through the resistor 7, the choke 3 and the control electrode of the thyristor 1, which is unlocked again, and the whole cycle of operation is repeated. The frequency of the generator is determined mainly by the parameters of the droplets 3, the capacitor 8 and the resistor 7. By adjusting the size of the resistor 7, you can achieve a change in the frequency of the generator and a wide range. The frequency of operation of the generator also depends on the voltage level of the power supply source 5, which must be less than the operating voltage for which the thyristor is designed. 1. Claims The pulse generator containing the thyristor, the anode of which is connected to the positive power supply bus and one capacitor plate, the other side of the capacitor through a choke is connected to the thyristor cathode, a serial RC circuit, a load connected by one output to the negative power supply bus, which is neither the reliability and stability of the pulse frequency, the thyristor cathode is connected via an input diode to the connection point of the resistor and capacitor of the RC circuit, the other terminals of the resistor and capacitor of which are connected respectively to the control electrode of the thyristor and the negative output of the power source; condenser. Sources of information taken into account in the examination. 1. Bilik V.V. et al. Pulse circuits on dinistors and thyristors, M, Nauka, 1968, p. 239. 2. USSR inventor's certificate No. 19879, class, H 02 M 3/1, 1971 (prototype).

Claims (1)

Claim A pulse generator containing a thyristor, the anode of which is connected to the positive bus of the power source and one capacitor plate, the other capacitor plate is connected via the inductor to the thyristor cathode, a serial RC circuit, a load connected by one output to the negative bus of the power source, which that, in order to increase the reliability and stability of the pulse repetition rate, the thyristor cathode is connected through the introduced diode to the connection point of the resistor and the capacitor of the RC circuit, the other terminals of the resistor and ndensatora which are respectively connected to the control electrode of the thyristor and the negative terminal of the power source, the other terminal of the load is connected to the second electrode of the capacitor.