Power transistor with turn off control and method for operating

Details Power transistor with turn off control and method for operating Power transistor with turn off control and method for operating

2009-08-28

2011-10-04

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

Reexamination Certificate

active

08030986

ABSTRACT:
A circuit has a power transistor, a driver control circuit, a variable clamp circuit and a turn-off control circuit. The power transistor has a first current electrode coupled to a first power supply terminal, a second current electrode as an output of the circuit, and a control electrode. The driver control circuit has an output coupled to the control electrode of the power transistor for controlling the power transistor during an active mode of the circuit. The variable clamp circuit is coupled between the output of circuit and the first power supply terminal. The turn-off control circuit is coupled to the variable clamp circuit and selects clamping levels of the variable clamp circuit during a transition from the active mode to an inactive mode of the circuit.

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PCT/US2010/044544 International Search Report and Written Opinion mailed Apr. 22, 2011.

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