Patent ID: 8901603
Filing Date: 2014-12-02
Classification: H01L,H03K,Y02E

Abstract:
1. A protection circuit for protecting a metal-oxide-semiconductor field-effect transistor from electrical surges, comprising: a switch for coupling the drain of the metal-oxide-semiconductor field-effect transistor to the gate of the metal-oxide-semiconductor field-effect transistor; a diode in series with the switch for preventing current flow from the gate of the metal-oxide-semiconductor field-effect transistor to the drain of the metal-oxide-semiconductor field-effect transistor; a bistable circuit for controlling the switch, the switch being closed whilst the bistable circuit is set and open whilst the bistable circuit is reset; detection circuit for setting the bistable circuit in response to the voltage difference between the drain and source of the metal-oxide-semiconductor field-effect transistor being relatively greater than a first predefined voltage threshold; and a means for resetting the bistable circuit in response to the voltage difference between the drain and source of the metal-oxide-semiconductor field-effect transistor being relatively lesser than a second predetermined voltage threshold.