Amplifier circuit and communication device

Details Amplifier circuit and communication device Amplifier circuit and communication device

2011-05-10

2011-05-10

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S291000, C330S253000

Reexamination Certificate

active

07940122

ABSTRACT:
There is provided an amplifier circuit having a common-source amplifier, an output load connected to an output terminal of the common-source amplifier, a buffer circuit connected to the output terminal of the common-source amplifier, a feedback circuit connected between an output terminal of the buffer circuit and an input terminal of the common-source amplifier, and a control circuit for controlling an impedance of the feedback circuit in accordance with a gain of the common-source amplifier.

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“Japanese Office Action” mailed by JPO and corresponding to Japanese application No. 2007-232605 on Mar. 9, 2010.

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