Transistor device drive circuit

Details Transistor device drive circuit Transistor device drive circuit

G - Physics

05

F

323/6

G05F 1/10 (2006.01) H03K 17/082 (2006.01) H03K 17/567 (2006.01)

Patent

CA 2019826

- 29 - Abstract of the Disclosure A semiconductor device drive circuit for turning on and off a semiconductor device comprises a main static induction transistor and a sense static induction transistor. The drive circuit comprises a first current source having one of its ends connected to a power supply and its other end connected to said main static induction transistor, a second current source having one of its ends connected to the power supply and its other end connected to said sense static induction transistor, a third current source having one of its ends connected to the power supply and its other end connected to the first current source and a fourth current source having one of its ends connected to the power supply and its other end connected to the second current source. The drive circuit has a comparing and control means for turning the first and second current sources on to apply a bias when the semiconductor device is turned on and to turn off the first and second current sources and turn on the third and fourth current sources when a voltage obtained by sensing a current flowing through the sense static induction transistor is higher than a specific voltage.

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