Automatic gain control circuit for a demodulation section of a m

Details Automatic gain control circuit for a demodulation section of a m Automatic gain control circuit for a demodulation section of a m

1993-08-19

1995-09-05

Chin, Stephen

Pulse or digital communications

Receivers

Automatic gain control

375222, 4552361, 330278, H04L 2708

Patent

active

054485959

ABSTRACT:
An automatic gain control circuit which is provided in a demodulation section of a modem to adjust the loop gain so that the level of a band-limited receive signal may have a predetermined reference value and to output the receive signal to an automatic equalization section of the modem. The automatic gain control circuit is improved in that, even when a disturbance of the circuit such as a gain hit or a drop-out occurs, regular communication can be continued without requiring a data mode leading-in operation. The automatic gain control circuit includes a reference value setting unit for generating a reference value, an error calculation unit for determining an error signal between the receive signal and the reference value, a receive level variation correcting controlling force setting unit for setting a receive level variation correcting controlling force to be added to the error signal, an error signal correction unit for correcting the error signal, an error signal averaging unit for averaging the corrected error signal and a feedback unit for feeding back, as the receive signal, the averaged corrected error signal. The receive level variation correcting controlling force to be set by the receive level variation correcting controlling force setting unit is varied in response to the error signal.

REFERENCES:
patent: 4458355 (1984-07-01), Motley et al.
patent: 4884141 (1989-11-01), Hyakutake
patent: 4969145 (1990-11-01), Maruyama et al.
patent: 5050192 (1991-09-01), Nawata
patent: 5065410 (1991-11-01), Yoshida et al.

Affiliated with

Also associated with

Rating

Automatic gain control circuit for a demodulation section of a m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic gain control circuit for a demodulation section of a m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic gain control circuit for a demodulation section of a m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-479148