JPS628729U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 3 show one embodiment of the switching transistor drive circuit of this invention.
The figure is a wiring diagram, Figures 2 a to c are timing charts for explaining the operation, Figures 3 a and b are waveform diagrams of the forward bias current and voltage between the collector and emitter of the switching transistor, respectively, and Figure 4 is a diagram of the conventional switch. Connection diagram of the driving circuit of the switching transistor, No. 5
6A to 6C are timing charts for explaining the operation of FIG. 4, and FIGS. 6A and 6B are waveform diagrams of the forward bias current and collector-to-emitter voltage of the switching transistor of FIG. 4, respectively. 1, 2...First and second DC power supplies, 3...Switching transistor, 21, 26...Current limiting resistor, 22
...Transistor for forward bias control, 23...Series circuit, 24...Resistor for high gate drive, 25...Capacitor for high gate drive, 27...Transistor for reverse bias control, 32...Base control section, 3
4...Resistance for shunting.

Claims (1)

[Scope of utility model registration request] A series circuit of a current limiting resistor and a forward bias control transistor, both ends of which are connected to the positive terminal of a forward bias DC power supply and the base of a switching transistor, and a high gate drive resistor and a high gate drive that are connected in parallel to the current limiting resistor. a series circuit of a capacitor for switching, a series circuit of another current-limiting resistor and a reverse bias control transistor, both ends of which are connected to the base of the switching transistor and the negative terminal of the reverse bias DC power supply, and two output terminals. a base control unit connected to the base of the forward bias control transistor and the base of the reverse bias control transistor;
A driving circuit for a switching transistor, the switching transistor having both ends connected to the base of the forward bias control transistor, and a current limiting resistor connected to a connection point of the other current limiting resistor and the reverse bias controlling transistor.