SU597069A1 - Blocking oscillator - Google Patents

Description

I

The invention relates to radio engineering, can be used in devices for generating pulses.

Known -blocking generator ,. containing a clock capacitor, transistor, transformer and diode 1.

However, in this blocking generator, the process of capacitive discharge strongly depends on the properties of the transistor.

Closest to the proposed blocking generator containing a transistor, a transformer, a capacitor and a resistor, the collector of the transistor through the primary winding of the transformer is connected to the power supply bus, which through a resistor is connected to the base of the transistor, and the second output is through a capacitor connected to the emitter of the transistor and f by a common power supply bus 2,

However, this blocking generator is not stable enough and has a low pulse generation frequency.

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

For this, a blocking generator containing a transistor, a transformer, a capacitor and a resistor, the collector of the transistor through the primary winding

2

A transformer is connected to a power supply bus which, through a resistor, is connected to the base of the transistor and to the output side of the transformer secondary winding, the second output of which is connected to the emitter of the transistor and to the common power supply bus, a single output of which is connected. with an additional transistor base, and the other with a common power supply bus and an additional transistor collector, the emitter of which is connected to the base of the main transistor.

The drawing shows a circuit diagram of a blocking generator.

The blocking generator contains a transistor 1, a transformer 2, a condensate op 3 and a resistor 4, and the collector transistor 1 through the transformer primary winding 5 is connected to the power supply bus 6, which through the resistor 4 is connected to the base of the transformer 1 and the second The output of which through a capacitor 3 is connected to the emitter of the transistor 1 and to the common bus 8 of the power source, an additional

a transistor 9 and a resistor 10, one output of which is connected to the base of the transistor 9, and the other to the common bus 8 of the power supply and collector of the transistor 9, the emitter of which is connected to the base of transistor 1.

The blocking generator operates in self-oscillating mode. The direct process proceeds under the conditions of self-excitation. An increase in the base current of transistor 1 causes an avalanche-like amplification of the current of its collector before the transistor switches to saturation mode. The base current charging capacitor 3 decreases. A vertex pulse is then formed.

After the process dies out, the capacitor 3 begins to discharge. The transistor 9 and the resistor 10 perform the functions of a current generator. The duration of the discharge is significantly reduced, and the process itself is stabilized. By varying the resistance of the resistor 10, it is possible to smoothly vary the discharge time within certain limits. The process then repeats.

The described blocking current generator on the basis of the resistor provides increased frequency and stability of the output pulses.

Claims (2)

1. USSR author's certificate No. 210219, H 03 K 3/30, 1966. 2. USSR author's certificate No. 155184, H 03 K 3/30, 1960.