Title:
フィルタ装置
Document Type and Number:
Japanese Patent JP5554464
Kind Code:
B2
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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Inventors:
Akihiko Matsuoka
Kentaro Miyano
Katsuaki Abe
Kentaro Miyano
Katsuaki Abe
Application Number:
JP2006105974A
Publication Date:
July 23, 2014
Filing Date:
April 07, 2006
Export Citation:
Assignee:
Panasonic incorporated company
International Classes:
H03H19/00
Attorney, Agent or Firm:
Koichi Washida