Filter circuit and detection circuit having filter circuit

Details Filter circuit and detection circuit having filter circuit Filter circuit and detection circuit having filter circuit

Filed on

2006-07-04

Date issued

2006-07-04

Examiner

Tra, Quan (Department: 2816)

Patent Class

Miscellaneous active electrical nonlinear devices, circuits, and

SubClass

Specific input to output function

SubSubClass

Combining of plural signals

Type

Reexamination Certificate

Status

active

Patent number

07071760

Description

ABSTRACT:
A filter circuit has an input terminal which is input with a first current, and which is coupled with a first node, capacitor, of which one terminal is coupled with the first node, of which the other terminal is coupled with a second node, and which integrates the first current and outputs voltage, a transconductance means, of which one terminal is coupled with the first node, of which another terminal is coupled with the second node, of which the other terminal is coupled with a third node, and which outputs a second current being proportional to the voltage to the third node and an output terminal which is coupled with the first node, and which outputs the voltage.

REFERENCES:
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patent: 6181197 (2001-01-01), Bret et al.
patent: 6184748 (2001-02-01), Rao et al.
patent: 6194959 (2001-02-01), Kamoshida et al.
patent: 6242963 (2001-06-01), Su et al.
patent: 6429721 (2002-08-01), Armitage et al.
patent: 6566951 (2003-05-01), Merrigan et al.
patent: 2001/0028695 (2001-10-01), Matsui
patent: 2002/0181619 (2002-12-01), McCune, Jr.
patent: 2004/0041616 (2004-03-01), Khlat et al.
patent: 2001339275 (2001-12-01), None

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