Method and system for mixed analog-digital automatic gain...

Details Method and system for mixed analog-digital automatic gain... Method and system for mixed analog-digital automatic gain...

2007-03-26

2008-08-05

Nguyen, Linh V (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S131000, C341S139000

Reexamination Certificate

active

07408489

ABSTRACT:
Aspects of the invention provide a method and system for a mixed analog-digital automatic gain control. The received analog signal is amplified by the analog amplifier and then converted to a digital value by an ADC. A clamp reference level of the converted signal is removed prior to applying a digital gain to a digital multiplied. Once the digital gain is applied, the clamp reference level is restored to the digital signal. A loop filter determines the system time response from the error between an amplitude parameter of the received signal and an AGC reference level. A gain separation circuit generates the system gain and separates it into a digital gain and an analog gain in a way to maximize the use of the analog amplifier. The analog gain is applied to the analog amplifier and the digital gain is applied to the digital multiplier.

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