Integrated overvoltage and reverse voltage protection circuit
US6882513B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2002 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Apr 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/819
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.