Low voltage detection circuit

Details Low voltage detection circuit Low voltage detection circuit

2006-10-27

2008-08-19

Brewster, William M. (Department: 4135)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S081000

Reexamination Certificate

active

07414440

ABSTRACT:
A low voltage detection circuit includes a reference voltage generation circuit, a divider circuit, a comparator that serves as a comparison circuit, and a second constant current transistor connected in series with the divider circuit. An auxiliary current transistor as well as a first constant current transistor is connected in series with a load element. The auxiliary current transistor is controlled by a voltage at a drain of the second constant current transistor. A gate of the second constant current transistor and a gate of the first constant current transistor are connected with each other to form a current mirror. A size of the second constant current transistor is adjusted so that the second constant current transistor can provide a second constant current that is several times larger than a first constant current provided by the first constant current transistor.

REFERENCES:
patent: 8-97694 (1996-04-01), None

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