Differential hysteresis comparator circuits and methods

Details Differential hysteresis comparator circuits and methods Differential hysteresis comparator circuits and methods

2009-02-23

2010-11-30

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S065000, C327S072000, C327S077000, C327S089000

Reexamination Certificate

active

07843230

ABSTRACT:
A comparator circuit for providing hysteresis comprises first and second differentially coupled transistors. The first of the differentially coupled transistors provides drain current to first and second load transistors. The second of the differentially coupled transistors provides drain current to third and fourth load transistors. In one example embodiment, the drain of the first of the differentially coupled transistors also drives the gate of the first and third load transistors, while the drain of the second of the differentially coupled transistors drives the gate of the second and fourth transistors.

REFERENCES:
patent: 5764086 (1998-06-01), Nagamatsu et al.
patent: 2007/0035334 (2007-02-01), Koike
patent: 2007/0040587 (2007-02-01), Chatal
patent: 2009/0058417 (2009-03-01), Yanasak et al.
patent: 2009/0058471 (2009-03-01), Ball

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