Gm-C FILTER CIRCUIT - MITSUBISHI MATERIALS CORP

Title:

Gm-C FILTER CIRCUIT

Document Type and Number:

Japanese Patent JP2002223148

Kind Code:

A

Abstract:

To provide a Gm-C filter circuit that has a high Q and is controlled with high accuracy.

Adjusting a ratio of a gate width to a gate length of a MOS transistor(TR) being a component of a Gm amplifier designs a Gm value of the Gm amplifier and the Gm-C filter circuit is configured with the Gm amplifiers adopting the identical circuit configuration and the identical control system to each other. In the case of controlling a slave filter circuit acting like the Gm-C filter circuit by using a control circuit including a master filter of the same circuit configuration, a capacitor to match an output side capacitance of the slave filter circuit and the master filter circuit with each other is added to an idle terminal having no succeeding circuit in output terminals of the slave filter circuit and the master filter circuit.

Inventors:

HANASHIMA NAOYUKI
YOKOSHIMA TAKAO
UEOKA YASUSHIGE
IWATA ATSUSHI

Application Number:

JP2001016752A

Publication Date:

August 09, 2002

Filing Date:

January 25, 2001

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP

International Classes:

H03H11/04; (IPC1-7): H03H11/04

Attorney, Agent or Firm:

Masatake Shiga (6 people outside)

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