AGC module and method for controlling noise figure and...

Details AGC module and method for controlling noise figure and... AGC module and method for controlling noise figure and...

2007-09-28

2009-12-01

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S283000

Reexamination Certificate

active

07626457

ABSTRACT:
An Automatic Gain Control (AGC) module for controlling Noise Figure (NF) and IM characteristics therein is disclosed. The AGC module comprises a plurality of AGC stages. Each AGC stage comprises a differential amplifier circuit, an input signal transistor and a current-steering circuit. Differential amplifier circuits of the plurality of AGC stages receive control signals at their differential inputs and their output is connected to a common load. The input signal transistors of the plurality of AGC stages receive a common input signal and is further coupled to the differential amplifier circuit and the current-steering circuit. The current-steering circuits and the control signals at the differential amplifier circuits control gain of the each AGC stage of the plurality of AGC stage, which is used to control the NF and the IM characteristics.

REFERENCES:
patent: 6917257 (2005-07-01), Gondi
patent: 7436262 (2008-10-01), Ashby et al.
patent: 2009/0085660 (2009-04-01), Mudd

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