Title:
SWITCHED CAPACITOR FILTER INTEGRATED CIRCUIT
Document Type and Number:
Japanese Patent JPS57203314
Kind Code:
A
Abstract:
PURPOSE: To realize a small size and a low cost of a circuit system, by forming an LPF for elimination of the folded noise within the same IC chip of a switched capacitor filter.
CONSTITUTION: A switched capacitor filter SCF302 consisting of an operational amplifier, a capacitor and an analog switch is converted into a monolithic IC. In addition, an LPF303 which eliminates the folded noise caused by sampling the input signal 312 on a time axis is formed within the same chip of the above- mentioned switched capacitor filter SCF which is converted into an IC. The LPF303 consists of a resistant and a capacitor which are converted into an IC respectively. In such way, a small size and a low cost are realized for a circuit system.
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Inventors:
MISAWA TOSHIYUKI
Application Number:
JP8860881A
Publication Date:
December 13, 1982
Filing Date:
June 09, 1981
Export Citation:
Assignee:
SUWA SEIKOSHA KK
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Previous Patent: JPS57203313
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