Gain control amplifier

Details Gain control amplifier Gain control amplifier

2010-01-27

2011-12-27

Mottola, Steven J (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

Reexamination Certificate

active

08085091

ABSTRACT:
Systems, methods, and devices provided herein are directed to improvements in gain control amplifiers that receive an input signal and generate an output signal with a selectively variable gain. A differential amplified gain stage receives an input signal and scales the input signal to generate a scaled signal. A gain adjust stage receives the scaled signal and an adjust signal and adjusts an amplitude of the scaled signal based on the adjust signal to generate an adjusted scaled signal. The adjusted scaled signal has a substantially constant impedance regardless of value of the adjust signal.

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