Dual automatic gain control and DC offset correction circuit for

Details Dual automatic gain control and DC offset correction circuit for Dual automatic gain control and DC offset correction circuit for

1995-11-08

1998-06-02

Chin, Wellington

Pulse or digital communications

Receivers

Automatic gain control

329304, 329308, 455219, H04B 106

Patent

active

057612510

ABSTRACT:
A circuit arrangement capable of achieving both DC offset correction and automatic gain control for QAM demodulation. The QAM signal is digitized and then the positive signal samples are averaged and combined with the negative signal samples. The sum of these two averages is an indication of the DC offset while the difference of these two averages is an indication of the gain factor for automatic gain control. Common circuitry is then alternately used to process the DC offset and the gain factor for automatic gain control.

REFERENCES:
patent: 5036527 (1991-07-01), Halim et al.
patent: 5539779 (1996-07-01), Nagahori
patent: 5563916 (1996-10-01), Scarpa

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