Document Type and Number:
Japanese Patent JPS6142449
Kind Code:
B2
Abstract:
The passive prefilter (61) is comprised only of a plurality of additional switched capacitors (62) which are added to a switched capacitor (63) common to a switched-capacitor filter (32). The switched capacitor (63) common to said switched-capacitor filter is driven by clock pulses at the sampling frequency of the filter. The prefilter samples and holds the input signal (VSin) at a rate equal to an even harmonic of the sampling frequency, combines all signals held over a sampling period, and provides the filter (32) with this summed signal (Vout). The prefilter reduces substantially any "alias signals", that is input signals (VSin) of a frequency close to the sampling frequency or to an harmonic of the sampling frequency.
More Like This:
| WO/1982/000229 | SAMPLING FILTER FOR REDUCING ALIASING DISTORTION |
| JPS62252209 | DISOVERLAPPER FOR MOS INTEGRATED CIRCUIT |
| JPS62291214 | SWITCHED CAPACITOR FILTER |
Inventors:
KATO SEIJI
UENO NORIO
TSUNOISHI MITSUO
ITO AKIHIKO
IWATA ATSUSHI
UENO NORIO
TSUNOISHI MITSUO
ITO AKIHIKO
IWATA ATSUSHI
Application Number:
JP6582879A
Publication Date:
September 20, 1986
Filing Date:
May 28, 1979
Export Citation:
Assignee:
FUJITSU KK
NIPPON DENSHIN DENWA KK
NIPPON DENSHIN DENWA KK
International Classes:
H03H19/00
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