Counter circuit, AD conversion method, AD converter,...

Details Counter circuit, AD conversion method, AD converter,... Counter circuit, AD conversion method, AD converter,...

2007-09-27

2009-02-24

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000, C377S045000, C377S107000, C377S110000

Reexamination Certificate

active

07495597

ABSTRACT:
An asynchronous counter that is capable of switching count mode includes flip-flops, and three-input single-output tri-value switches respectively provided between the adjacent pairs of the flip-flops. The tri-value switches switch among three values, namely, non-inverting outputs and inverting outputs of the flip-flops and a power supply level. Each of the tri-value switches switch among the three input signals according to two-bit control signals, and input a selected signal to a clock terminal of a subsequent flip-flop. When count mode is switched according to the control signals, a count value immediately before the mode switching is set as an initial value, and counting after the mode switching is started from the initial value.

REFERENCES:
patent: 4023160 (1977-05-01), Kirschner
patent: 4509183 (1985-04-01), Wright
patent: 5877715 (1999-03-01), Gowda et al.
patent: 6567340 (2003-05-01), Nataraj et al.
patent: 6735270 (2004-05-01), Yeung
patent: 7292177 (2007-11-01), Muramatsu et al.
patent: 1566891 (2005-08-01), None
patent: 1 592 134 (2005-11-01), None
patent: 61-100025 (1986-05-01), None
patent: 1987 195924 (1987-08-01), None
patent: 1994 311025 (1994-04-01), None
patent: 6-164372 (1994-06-01), None
patent: 1999 017526 (2008-09-01), None
patent: 1750056 (1992-07-01), None
Database WPI; Section EI, Week 199330; Derwent Publications Ltd., London, GB; AN 1993-241486 XP002367192.
Stan, Mircea R.; Long and Fast Up/Down Counters; IEEE Transactions on Computers, IEEE Service Center, Los Alamitos, CA, US, vol. 47, No. 7, Jul. 1998, pp. 722-735, XP000782017.
European Search Report dated Feb. 28, 2006.
European Search Report dated May 11, 2006.
Office Action issued on Mar. 11, 2008 in corresponding Japanese Patent Application JP 2004 129389.

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