Hysteresis comparator circuit

Details Hysteresis comparator circuit Hysteresis comparator circuit

2007-01-30

2007-01-30

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

C327S206000, C327S063000, C327S065000, C327S067000

Reexamination Certificate

active

11043233

ABSTRACT:
An input voltage is applied to an inverting input terminal of a comparator having no hysteresis. A first constant voltage is divided by resistors to create a reference voltage. The reference voltage is applied to a non-inverting input terminal of the comparator through a resistor. Only while an output voltage of the comparator is a low level, a predetermined constant current is supplied to a supply point of the reference voltage and a constant current of the same magnitude is absorbed from the non-inverting input terminal of the comparator.

REFERENCES:
patent: 4922132 (1990-05-01), Horvitz et al.
patent: 5959437 (1999-09-01), Hamaguchi
patent: 6462591 (2002-10-01), Garrett et al.
patent: 6979984 (2005-12-01), Perrier et al.
patent: 7038522 (2006-05-01), Fauh et al.
patent: 2005/0040878 (2005-02-01), Garrett et al.
patent: A-2003-8408 (2003-01-01), None
patent: A-2003-179468 (2003-06-01), None

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