Amplifiers – With semiconductor amplifying device – Including gain control means
Reexamination Certificate
2007-05-22
2007-05-22
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including gain control means
C330S075000, C330S278000
Reexamination Certificate
active
11152963
ABSTRACT:
A window comparator compares a level of an output signal with an attack reference level, and outputs an attack signal based upon an attack reference comparison result signal thus obtained, and compares the output signal level with a recovery reference level, and outputs a recovery signal based upon a recovery reference comparison result signal thus obtained. An attack timing signal generating unit outputs an attack timing signal at first predetermined time intervals. A recovery timing signal generating unit outputs a recovery timing signal at second time intervals which are longer than the first predetermined time interval. An action determining circuit generates a gain reduction signal and a gain increase signal. The amplification gain of the variable gain amplifier is reduced or increased based upon the gain reduction signal or the gain increase signal.
REFERENCES:
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patent: 5771301 (1998-06-01), Fuller et al.
patent: 6418303 (2002-07-01), Blackburn et al.
patent: 6628795 (2003-09-01), Ludvigsen
patent: 7065335 (2006-06-01), Ben-Ayun et al.
patent: 2006/0017501 (2006-01-01), Nodake
patent: 2003-173211 (2003-06-01), None
Cantor & Colburn LLP
Nguyen Patricia
Rohm & Co., Ltd.
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