Integrated overvoltage and reverse voltage protection circuit

Details Integrated overvoltage and reverse voltage protection circuit Integrated overvoltage and reverse voltage protection circuit

2005-04-19

2005-04-19

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S084000

Reexamination Certificate

active

06882513

ABSTRACT:
An integrated overvoltage and reverse voltage protection circuit. The protection circuit includes a field-effect transistor having a source terminal coupled to an input terminal of the protection circuit, and a drain terminal coupled to an output terminal of the protection circuit. A resistor is coupled between the source terminal and the body terminal of the field-effect transistor to inhibit reverse current flow during a reverse voltage condition. A voltage-current dependent circuit is coupled between the gate terminal and the source terminal of the field-effect transistor, and is configured to apply a voltage between the gate terminal and the source terminal that is dependent on the current passing through the voltage-current dependent circuit. A current application circuit is coupled to the voltage-current dependent circuit and is configured to apply a current that limits or even altogether stops an applied overvoltage condition from reaching a load circuit.

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