FILTER - YOKOGAWA ELECTRIC CORP

Title:

FILTER

Document Type and Number:

Japanese Patent JPH03293810

Kind Code:

A

Abstract:

PURPOSE: To compensate the error factor due to analog switches provided for switching of the cut-off frequency by compensating the gain by a ratio of the resultant capacity of capacitors in an input part to that in an output part.

CONSTITUTION: In an input part 4, a gain compensating circuit 41 has plural capacitors selectively connected in parallel to a resistance R1 by analog switches. In an output part 6, a gain adjusting circuit 61 has plural capacitors selectively connected in parallel with a resistance R9 by analog switches. A ratio of the resultant capacity of capacitors connected in parallel in the input part 4 to that in the output part 6 is adjusted. The gain variance due to analog switches for switching of the cut-off frequency is compensated.

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Inventors:

TERAI KENJI

Application Number:

JP9561590A

Publication Date:

December 25, 1991

Filing Date:

April 11, 1990

Export Citation:

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Assignee:

YOKOGAWA ELECTRIC CORP

International Classes:

H03H19/00; (IPC1-7): H03H19/00

Attorney, Agent or Firm:

Masayasu Watanabe

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