Electrical computers: arithmetic processing and calculating – Electrical analog calculating computer – Particular function performed
Reexamination Certificate
2007-04-06
2010-02-16
Mai, Tan V (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical analog calculating computer
Particular function performed
Reexamination Certificate
active
07664811
ABSTRACT:
A switched capacitor type filter apparatus includes sampling capacitors and has a steep characteristic with a small number of taps. The filter apparatus includes positive polarity selecting switches, negative polarity selecting switches, positive read-out switches, negative polarity read-out switches, and a timing control unit. Thus, it is possible to read out a negative charge by controlling the polarity upon write-in and the polarity upon read-out to be identical or different. Accordingly, it is possible to set a negative coefficient as a filter weighting coefficient. This configuration causes a finite impulse filter (FIR) to have a steep characteristic.
REFERENCES:
patent: 6192386 (2001-02-01), Shinde
patent: 6963732 (2005-11-01), Muhammad et al.
patent: 7003276 (2006-02-01), Muhammad et al.
patent: 7272187 (2007-09-01), Shimizu
patent: 7539721 (2009-05-01), Belveze et al.
patent: 2002/0172170 (2002-11-01), Muhammad et al.
patent: 2003/0050027 (2003-03-01), Muhammad et al.
patent: 56-071324 (1981-06-01), None
patent: 2003-317026 (2003-11-01), None
patent: 2006-066178 (2006-03-01), None
Abe Katsuaki
Matsuoka Akihiko
Miyano Kentaro
Greenblum & Bernstein P.L.C.
Mai Tan V
Panasonic Corporation
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