Amplitude based coarse automatic gain control circuit

Details Amplitude based coarse automatic gain control circuit Amplitude based coarse automatic gain control circuit

1998-02-05

2000-06-27

Pham, Chi H.

Pulse or digital communications

Receivers

Automatic gain control

333128, 4552341, 348678, H04L 2708, H03G 320, H04B 106, H04N 552

Patent

active

060815655

ABSTRACT:
A digital automatic gain control circuit for a receiver includes an averaging block and an adjustment block. The averaging block receives a length of a digital sample stream that represents an incoming analog signal and produces an absolute average signal. The adjustment block receives the absolute average signal and a reference signal and outputs an adjustment signal for controlling gain. The adjustment signal is based on a difference between the absolute average signal and the reference signal. In an alternative embodiment, a method of controlling gain according to the invention includes the steps of calculating an absolute average of an incoming signal, and comparing the absolute average to a reference to produce an adjustment signal based on a difference between the absolute average and the reference.

REFERENCES:
patent: 5220564 (1993-06-01), Tuch et al.
patent: 5519441 (1996-05-01), Gusmano et al.
patent: 5563916 (1996-10-01), Scarpa
patent: 5565932 (1996-10-01), Citta et al.
patent: 5841820 (1998-11-01), Krishnamurthy et al.

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