Low power input with hysteresis circuit and methods therefor

Details Low power input with hysteresis circuit and methods therefor Low power input with hysteresis circuit and methods therefor

2005-12-13

2005-12-13

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

C327S112000

Reexamination Certificate

active

06975153

ABSTRACT:
A low power input with hysteresis circuit provides input hysteresis (for instance, from supply voltage ranges of 0.8 volt to 5.5 volts), while reducing the high-current region and the overall power consumption of an electronic device. The present invention utiliizes resistors and feedback transistors to limit the “through current” of the device when it is switching, and to provide extra hysteresis to the input circuit. The hysteresis can be adjusted by altering the resistance of the resistors. The present invention provides a very large hysteresis, or may be slightly modified to supply very little hystersis while having little effect on propagation delays, as compared with conventional input circuits with similar hysteresis. Accordingly, the present invention reduces the high-current region and the power consumption of the device while providing the required hystersis on the input.

REFERENCES:
patent: 5767728 (1998-06-01), Michail et al.
patent: 6801073 (2004-10-01), Morgan
patent: 01010718 (1989-01-01), None
patent: 2000332580 (2000-11-01), None

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