Variable gain selection in direct conversion receiver

Details Variable gain selection in direct conversion receiver Variable gain selection in direct conversion receiver

2006-07-11

2006-07-11

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S232100, C455S296000, C375S344000, C375S346000

Reexamination Certificate

active

07076225

ABSTRACT:
A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.

REFERENCES:
patent: 4025869 (1977-05-01), Smith
patent: 4213097 (1980-07-01), Chiu et al.
patent: 5014013 (1991-05-01), Kotzian
patent: 5095533 (1992-03-01), Loper
patent: 5179730 (1993-01-01), Loper
patent: 5263194 (1993-11-01), Ragan
patent: 5422889 (1995-06-01), Sevenhans et al.
patent: 5463662 (1995-10-01), Sutterlin et al.
patent: 5483691 (1996-01-01), Heck et al.
patent: 5612975 (1997-03-01), Becker et al.
patent: 5627857 (1997-05-01), Wilson
patent: 5629960 (1997-05-01), Dutkiewicz et al.
patent: 5898912 (1999-04-01), Heck et al.
patent: 5946607 (1999-08-01), Shiino et al.
patent: 6018553 (2000-01-01), Sanielevici et al.
patent: 6038268 (2000-03-01), Kawai
patent: 6205183 (2001-03-01), Dent
patent: 6243569 (2001-06-01), Atkinson
patent: 6275543 (2001-08-01), Petrus et al.
patent: 6366622 (2002-04-01), Brown et al.
patent: 6442383 (2002-08-01), Lemura
patent: 6459889 (2002-10-01), Ruelke
patent: 6498929 (2002-12-01), Tsurumi et al.
patent: 6509777 (2003-01-01), Razavi et al.
patent: 6516185 (2003-02-01), MacNally
patent: 6535560 (2003-03-01), Masenten
patent: 6600911 (2003-07-01), Morishige et al.
patent: 6654593 (2003-11-01), Simmons et al.
patent: 6654594 (2003-11-01), Hughes et al.
patent: 6732228 (2004-05-01), Willardson
patent: 6748200 (2004-06-01), Webster et al.
patent: 6763228 (2004-07-01), Prentice et al.
patent: 2001/0024481 (2001-09-01), Lee
patent: 2001/0049267 (2001-12-01), Takalo
patent: 2002/0037706 (2002-03-01), Ichihara
patent: 2002/0097081 (2002-07-01), Razavi
patent: 2002/0111152 (2002-08-01), Razavi
patent: 2002/0160734 (2002-10-01), Li et al.
patent: 2003/0013419 (2003-01-01), Razavi
patent: 2003/0100286 (2003-05-01), Severson et al.
patent: 2229333 (1990-09-01), None
patent: 9620540 (1996-07-01), None

Affiliated with

Also associated with

Rating

Variable gain selection in direct conversion receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable gain selection in direct conversion receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable gain selection in direct conversion receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3577093