JPS5995796U - Switching transistor cutoff signal supply device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing one embodiment of this invention, Fig. 2 is an output waveform diagram of the main part of Fig. 1, Fig. 3 is a circuit diagram showing another current flow side, and Fig. 4 is a circuit diagram showing the main part of Fig. 1. 3 is an output waveform diagram of the main part, FIG. 5 is a schematic explanatory diagram of a conventional example, and FIG. 6 is an output waveform diagram of the main part. 2: Main transformer, 4 switching transistors, 4a:
Drive transistor, 4b: Cutoff transistor, 5:
Drive transformer, 6: Cutoff signal supply circuit, 6a: Auxiliary winding.

Claims (1)

[Scope of utility model registration request] A switching transistor connected in series to the primary winding of the main transformer is connected intermittently to the output voltage of the drive transformer which receives a control signal to the secondary winding and is induced in the secondary winding. A device for adjusting the secondary output voltage of a transformer includes an auxiliary winding wound on the secondary side of the drive transformer, and a parallel circuit consisting of a diode and a capacitor connected to the output terminal of the auxiliary winding. 1. A switching transistor cutoff signal supply device, comprising: charging the capacitor when the switching transistor is on, and applying a negative voltage of the capacitor to the switching transistor when the switching transistor is off.