Apparatus using sampling capacitors

Details Apparatus using sampling capacitors Apparatus using sampling capacitors

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.

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