| 摘要 |
PROBLEM TO BE SOLVED: To provide a bidirectional switch having a simple circuit configuration to suppress an overvoltage in both directions. SOLUTION: The bidirectional switch includes: a semiconductor switch Q3 which has a drain, a source and a gate, has an HEMT (High Electron Mobility Transistor) structure so that a main electrode having a lower potential of the drain and the source serves as a virtual source and a main electrode having a higher potential of the drain and the source serves as a virtual drain, and turns on/off a current in both directions by a gate signal to be applied between the gate and the virtual source; a gate signal part 13 which is connected between the gate and the virtual source of the semiconductor switch Q3 and applies the gate signal to the gate; and an overvoltage protection circuit which is connected between the virtual drain and the gate of the semiconductor switch Q3 and has a resistor 16 and a constant voltage diode 15. COPYRIGHT: (C)2011,JPO&INPIT
|
