Automatic gain control system

Details Automatic gain control system Automatic gain control system

1990-06-22

1992-07-28

Kuntz, Curtis

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

375 98, H04B 116

Patent

active

051347229

ABSTRACT:
An automatic gain control system handles inphase and quadrature phase signals, and is for use in digital cellular radio receiver equipment. The system comprises an inphase signal path and a quadrature phase signal path, each path including a logarithmic attenuator, the inphase and quadrature phase signal paths each including a feedforward path including a logarithmic detector. The output of the detectors are compared by respective comparators with an analogue signal, and output signals from the comparators are arranged to control a counter arrangement which generates a data word which is used to control the performance of the logarithmic attenuators.

REFERENCES:
patent: 3774113 (1973-11-01), Chasek
patent: 4580287 (1986-04-01), Richards, Jr.
patent: 4604755 (1986-08-01), Murray
patent: 4811423 (1989-03-01), Eastmond

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