Zero input current-drain comparator with high accuracy trip...

Details Zero input current-drain comparator with high accuracy trip... Zero input current-drain comparator with high accuracy trip...

2011-03-01

2011-03-01

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S080000, C327S081000, C327S083000

Reexamination Certificate

active

07898301

ABSTRACT:
A comparator circuit (300) has a first field effect transistor (FET) (307) with a supply voltage (301) connection and a diode connected FET (303) connected in series to form the first circuit leg of the comparator (300). A second diode connected FET (309) and a second FET (305) in series form the second circuit leg. The first FET (307) and said second FET (305) are approximately equal sized FETs. Another embodiment is an integrated circuit (401) with two n-channel FETs. A first diode connected FET (303) is connected to the first n-channel FET (307) in series to form the first circuit leg of a comparator (300) and a second diode connected FET (309) is connected to a second n-channel FET (305) in series to form the second circuit leg of the comparator. The two n-channel FETs that form the differential pair are approximately equal in size. The trip point is high with respect to the supply voltage.

REFERENCES:
patent: 4071783 (1978-01-01), Knepper
patent: 6081140 (2000-06-01), King
patent: 6801059 (2004-10-01), Lee
patent: 2005/0184761 (2005-08-01), Isomura
patent: 2005/0184798 (2005-08-01), Higemoto et al.
patent: 2005/0218938 (2005-10-01), Sugano

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