NMOS reverse battery protection

Details NMOS reverse battery protection NMOS reverse battery protection

2007-12-25

2007-12-25

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C361S245000, C361S246000

Reexamination Certificate

active

11077475

ABSTRACT:
A reverse polarity protected system comprises a voltage source that includes positive and negative terminals. A polarity-sensitive device has a first terminal that communicates with the positive terminal of the voltage source, and that includes a second terminal. A low-resistance switch communicates with the first and second terminals of the voltage source, and communicates with the second terminal of the polarity-sensitive device. The low-resistance switch assumes a conducting state between the second terminal of the polarity-sensitive device and the negative terminal of the voltage source when a first voltage at the positive terminal of the voltage source minus a second voltage at the negative terminal of the voltage source is greater than a threshold voltage. Otherwise, the low-resistance switch assumes a non-conducting state.

REFERENCES:
patent: 4546302 (1985-10-01), Smith
patent: 4868706 (1989-09-01), Zaderej
patent: 5517379 (1996-05-01), Williams et al.
patent: 5539610 (1996-07-01), Williams et al.
patent: 5757600 (1998-05-01), Kiraly
patent: 6154081 (2000-11-01), Pakkala et al.
patent: 6239515 (2001-05-01), Mackel et al.

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