Dual loop automatic gain control

Details Dual loop automatic gain control Dual loop automatic gain control

2006-10-03

2006-10-03

Vo, Nguyen T. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S239100, C455S250100, C455S253100, C455S253200, C375S345000, C375S346000

Reexamination Certificate

active

07116955

ABSTRACT:
An AGC circuit includes both wide-band and narrow-band VGAs. Two power monitors monitor the power level of the two VGAs. Based upon the signals provided by the power monitors, the AGC circuit derives two error terms. The AGC circuit filters and combines the error terms to determine a desired adjustment to the total gain and a desired adjustment to the distribution of the gain between the wide-band VGA and the narrow-band VGA. The AGC circuit also minimizes the noise figure of the narrow-band VGA subject to linearity constraints.

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Isaac Martinez G.; “Automatic Gain Control (AGC) Circuits, Theory and Design”; University of Toronto; Fall 2001; http://www.eecg.toronto.edu/˜kphang/ece1352f/papers/martin AGC.pdf.

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