Comparator switching apparatus and method

Details Comparator switching apparatus and method Comparator switching apparatus and method

2007-05-08

2007-05-08

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S074000

Reexamination Certificate

active

11239083

ABSTRACT:
An operation switching circuit switches over two comparators, which receives communication data, in accordance with a normal mode and a standby mode of a microcomputer. A delay circuit delays a mode switching signal. The mode switching signal and the delayed signal are combined by an OR gate and an AND gate to two comparator control signals, which have different high level periods. The comparators are driven by the comparator control signals, while a multiplexer is driven by the delayed signal. When one comparator is switched from the inoperative state to the operative state, the other comparator is continued to be held operative for the delay period before being switched to the inoperative state.

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patent: 5933459 (1999-08-01), Saunders et al.
patent: 6407591 (2002-06-01), Wong et al.
patent: 6873193 (2005-03-01), Kinoshita et al.
patent: A-7-64680 (1995-03-01), None

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