Comparator circuit

Details Comparator circuit Comparator circuit

2006-09-19

2006-09-19

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S321000

Reexamination Certificate

active

07109761

ABSTRACT:
A reference voltage and an input signal voltage are applied to gates of FETs each equipped with a LOCOS-drain structure, respectively, and currents according to the voltages are made to flow from a power supply voltage Vbat to drain sides through resistors and sources, respectively. The currents are made to flow in FETs to be converted to voltages. Then, both voltages are compared in a comparator. When a potential of a reference voltage input terminal in the comparator that operates with power provided by a power supply Vcc tends to rise above a predetermined level, a FET is turned on and clamps the voltage so as to suppress its potential rise.

REFERENCES:
patent: 5696400 (1997-12-01), Yoshida et al.
patent: 6011414 (2000-01-01), Majid et al.
patent: 6600639 (2003-07-01), Teo et al.
patent: 6703813 (2004-03-01), Vladislav et al.
patent: 6894542 (2005-05-01), Prexl et al.

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