Brown-out detector

Details Brown-out detector Brown-out detector

2005-05-17

2005-05-17

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000

Reexamination Certificate

active

06894544

ABSTRACT:
A brown-out detector that continuously monitors power supply voltage and provides an output signal that transitions to a logic HIGH state when the monitored power supply voltage exceeds a predetermined threshold value. One embodiment of the present invention comprises a first voltage reference with respect to ground that varies in direct proportion to absolute temperature, a second voltage reference with respect to the supply voltage that varies inversely with absolute temperature, and a comparator having the first voltage reference coupled to one input, and the second voltage reference coupled to the other input, such that the comparator output changes state when the power supply voltage exceeds a predetermined threshold voltage that is relatively independent of absolute temperature. The circuit may also be configured such that the first voltage reference varies inversely with absolute temperature, while the second voltage reference varies in direct proportion to absolute temperature.

REFERENCES:
patent: 4961102 (1990-10-01), Shideler et al.
patent: 5043599 (1991-08-01), Zitta
patent: 5144159 (1992-09-01), Frisch et al.
patent: 5324996 (1994-06-01), Mote, Jr.
patent: 5959477 (1999-09-01), Chung
patent: 6239630 (2001-05-01), Bowers et al.
patent: 6437614 (2002-08-01), Chen
patent: 6686783 (2004-02-01), Huang

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