Signal extraction circuit and distortion-compensated...

Amplifiers – Hum or noise or distortion bucking introduced into signal...

Reexamination Certificate

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C330S107000, C330S151000, C375S296000

Reexamination Certificate

active

07456688

ABSTRACT:
To cancel a reflected wave reflected from a connecting portion (22) and leaking into a feedback signal when a non-matched component is connected, the reflected wave is extracted by a circulator (30) and its phase and amplitude are adjusted by a vector adjusting circuit (32), and then the thus adjusted reflected wave is vector-summed with the feedback signal in a vector sum circuit (34).

REFERENCES:
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patent: 6066984 (2000-05-01), Tomaru et al.
patent: 6489844 (2002-12-01), Yamashita et al.
patent: 6567478 (2003-05-01), Oishi et al.
patent: 6949976 (2005-09-01), Funyu et al.
patent: 57-113603 (1982-07-01), None
patent: 05-14291 (1993-01-01), None
patent: 06-268536 (1994-09-01), None
patent: 2004-248109 (2004-09-01), None
patent: 2004-304385 (2004-10-01), None
patent: 2004-336291 (2004-11-01), None
Supplementary European Search Report Communication dated Jun. 4, 2008 Application No. 04822513.0 - 1233; PCT/JP2004017799.

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