Iterative automatic gain control for an analog front end of a mo

Details Iterative automatic gain control for an analog front end of a mo Iterative automatic gain control for an analog front end of a mo

1990-02-05

1991-07-30

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

455242, 455245, 330279, H03G 320

Patent

active

050365274

ABSTRACT:
An apparatus and method is provided for detecting and amplifying the level of a received signal in the analog front end of a modem so as to maintain the level of the signal below a predetermined signal clipping level. An incoming signal is amplified by a predetermined amount of gain to provide a received signal. The level of the received signal is compared to a first reference level and a second reference level by a signal level detector. The comparative information regarding the level of the received signal is provided to a signal adjustment controller which provides control signals to the amplifier to maintain the received signal level between the first and second reference levels.

REFERENCES:
patent: 4204172 (1980-05-01), Sadou et al.
patent: 4301445 (1981-11-01), Robinson
patent: 4718119 (1988-01-01), Salzer et al.
patent: 4794620 (1980-12-01), Moore et al.
patent: 4829593 (1989-05-01), Hara
"An Analog Front End for High Speed Turnaround Modems", by R. Halim and D. Shamlou, IEEE CICC Conference Paper, May, 1989.

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