Tunable filter and portable telephone

Details Tunable filter and portable telephone Tunable filter and portable telephone

2006-11-14

2006-11-14

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Automatically controlled systems

C333S189000, C333S193000

Reexamination Certificate

active

07135940

ABSTRACT:
A tunable filter has a plurality of variable capacitors and a plurality of inductor elements, each being formed on a common substrate, a filter circuit formed by using at least a portion of the plurality of variable capacitors and a portion of the plurality of inductor elements, a monitor circuit formed by using at least a portion of the plurality of variable capacitors and a portion of the plurality of inductor elements, a detecting circuit which detects a prescribed circuit constant of the monitor circuit, a storage which stores information relating to a reference circuit constant of the monitor circuit, and a capacitance control circuit which controls capacitance of the variable capacitors in the monitor circuit and capacitance of the variable capacitors in the filter circuit, based on a result detected by the detecting circuit and information stored in the storage.

REFERENCES:
patent: 5493715 (1996-02-01), Humphreys et al.
patent: 5933062 (1999-08-01), Kommrusch
patent: 6307442 (2001-10-01), Meyer et al.
patent: 6653913 (2003-11-01), Klee et al.
patent: 6759916 (2004-07-01), Ishizaki et al.
patent: 6791430 (2004-09-01), Borzenets et al.
patent: 6882246 (2005-04-01), Marquardt et al.
patent: 7049902 (2006-05-01), Myong et al.
patent: 2003/0067368 (2003-04-01), Ohara et al.
patent: 2004/0012463 (2004-01-01), Kawakubo et al.
patent: 2005/0184627 (2005-08-01), Sano et al.
patent: 2005/0194867 (2005-09-01), Kawakubo et al.
patent: 2005/0242687 (2005-11-01), Kawakubo et al.
patent: 2005/0280476 (2005-12-01), Abe et al.
patent: 2006/0067840 (2006-03-01), Kawakubo et al.
patent: 2003-22074 (2003-01-01), None
patent: 2003-179518 (2003-06-01), None
U.S. Appl. No. 11/043,257, filed Jan. 27, 2005, Sano et al.
U.S. Appl. No. 11/054,404, filed Feb. 10, 2005, Kawakubo et al.
U.S. Appl. No. 11/115,107, filed Apr. 27, 2005, Kawakubo et al.
U.S. Appl. No. 11/151,343, filed Jun. 14, 2005, Abe et al.
U.S. Appl. No. 11/229,694, filed Sep. 20, 2005, Kawakubo et al.

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