A gain control arrangement and method

Details A gain control arrangement and method A gain control arrangement and method

H - Electricity

03

G

H03G 3/20 (2006.01) G11B 7/005 (2006.01) G11B 20/10 (2006.01) H04B 10/17 (2006.01) H04L 25/497 (2006.01)

Patent

CA 2261981

A gain control arrangement is suitable for controlling the gain of a variable gain amplifier in dependence on the difference between the actual magnitude and the desired magnitude of a read signal provided over an optical data carrier read channel. The amplitude of the read signal is sampled at periodic sampling points to determine an envelope value based on the sample value at a sampling point and an envelope value at a preceding sampling point, and a gain error value is derived from the difference between that envelope value and a desired envelope value.

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