Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-03-06
2007-03-06
Nguyen, Lee (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C375S345000
Reexamination Certificate
active
10952035
ABSTRACT:
An Automatic Gain Control (AGC) method and system thereof. The power of a detected signal is first checked to ensure that it is large enough for AGC process. A power average of the detected signal is computed and compared to a first threshold in order to determine whether to proceed with a coarse tune procedure or enter a fine tune procedure. Both Low Noise Amplifier (LNA) gain and Variable Gain Amplifier (VGA) gain are tuned during coarse tune, whereas only the VGA gain is tuned during fine tune. The LNA and VGA gains are tuned to predetermined values during coarse tune, and the VGA gain is adjusted according to a difference between a computed average of power and a second threshold.
REFERENCES:
patent: 5563916 (1996-10-01), Scarpa
patent: 2006/0094384 (2006-05-01), Rouphael et al.
Kao Kai-Pon
Wang Chih-Chia
Nguyen Lee
Via Technologies Inc.
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