Automatic gain control with digital filtering for...

Details Automatic gain control with digital filtering for... Automatic gain control with digital filtering for...

2006-01-10

2006-01-10

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C455S232100

Reexamination Certificate

active

06985099

ABSTRACT:
An automatic gain control includes a digital lowpass filter for filtering a series of digital samples generated by an analog-to-digital converter to generate a lowpass filtered digital sample series; a power averager coupled to the digital lowpass filter for calculating an average power of the lowpass filtered digital sample series; and a lookup table coupled to the power averager for setting a selectable gain of an amplifier coupled to the analog-to-digital converter as a function of the average power.

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Crochiere et al. Interpolation and Decimation of Digital Signals—A Tutorial Review, IEEE, original publication: Proceedings IEEE vol. 69, pp. 300-331, Mar. 1981; reprinted IEEE Press 1992 Oversampling Delta-Sigma Data Converters, editors Candy, J.C. & Temes, G. pp. 417-448.

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