SU119277A1 - Blocking generator circuit - Google Patents

Description

Blocking generators are known in which the adjustment of the duration of the generated pulses is carried out by varying the capacitance of the grid circuit or by varying the transformer bias current, the counter magnetizing current. Such schemes make it impossible to vary the duration of the generated pulses within fairly wide limits.

This drawback in the described scheme is eliminated by the fact that in it the change in the duration of the output pulses is achieved by changing the constant charging time of the magnetic circuit. The change in the constant time is made using an adjustable voltage connected through a nonlinear resistance parallel to the lamp of the blocking generator.

Scheme of the blocking generator shown in the drawing.

The crystal diode D used as a nonlinear resistance and the source of the regulated voltage E are connected in series and connected to the primary winding of the transformer TR blocking generator parallel to the lamp L. During pulse generation, when the voltage on the anode of the lamp L decreases, the diode D is unlocked and the current rise through the transformer stops. By adjusting the magnitude of the control voltage E, the constant of the charge time of the magnetic circuit is changed; as a result, it is possible to change the pulse duration by a factor of 5–8, and the change in the amplitude of the pulses does not exceed 10–15%.

Subject invention

A blocking generator circuit with a smooth variation of the pulse width in a wide range, characterized in that, in order to change the constant charge time of the magnetic circuit, a non-linear non-linear circuit is connected to the primary side of the blocking generator transformer. resistance in the form of a crystalline diode and voltage source, the magnitude of which is regulated.