Title:
FILTER CIRCUIT
Document Type and Number:
Japanese Patent JP2000124774
Kind Code:
A
Abstract:
To reduce noise generated by an operational amplifier.
A switched capacitor 10i provided with a capacitive element Ci and the capacitive element C are arranged in a feedback path between the output terminal and inverted input terminal of the operational amplifier AMP1. By the switched capacitor 10i, signals between the capacitive element C arranged in the feedback path of the operational amplifier AMP1 are sampled so as to reduce the noise and transferred to the next stage. Thus the noise generated by the operational amplifier AMP1 is reduced and the deterioration of an S/N is prevented.
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Inventors:
KAWABE AZUMA
Application Number:
JP29486798A
Publication Date:
April 28, 2000
Filing Date:
October 16, 1998
Export Citation:
Assignee:
SONY CORP
International Classes:
H03H19/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Youichiro Fujishima
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