DC offset cancellation circuit for a receiver

Details DC offset cancellation circuit for a receiver DC offset cancellation circuit for a receiver

2006-01-28

2011-10-11

Nguyen, Duc M (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S067110, C455S310000, C455S312000, C455S226100

Reexamination Certificate

active

08036622

ABSTRACT:
Techniques for cancelling DC offset are described. A DC offset cancellation circuit in a receiver cancels DC offsets caused by leaked LO (local oscillator) signals from a LO signal generator. The receiver first calibrates itself by using the DC offset cancellation circuit during a transmit mode. During the calibration, the DC offset cancellation circuit stores the DC offset voltage signal caused by the leaked LO signals. During a receiving mode when the receiver is receiving a signal, the receiver subtracts the stored DC offset voltage signal from the received signal to cancel the DC offsets caused by leaked LO signals.

REFERENCES:
patent: 3764983 (1973-10-01), Stok
patent: 4958139 (1990-09-01), Hyatt
patent: 5724653 (1998-03-01), Baker et al.
patent: 5812025 (1998-09-01), Shimazaki
patent: 5898912 (1999-04-01), Heck et al.
patent: 6009317 (1999-12-01), Wynn
patent: 6075409 (2000-06-01), Khlat
patent: 6122487 (2000-09-01), Yamashita
patent: 6144243 (2000-11-01), Vaisanen
patent: 6240100 (2001-05-01), Riordan et al.
patent: 6498929 (2002-12-01), Tsurumi
patent: 6748200 (2004-06-01), Webster
patent: 6907235 (2005-06-01), Lisenbee
patent: 7020220 (2006-03-01), Hansen
patent: 7110734 (2006-09-01), Mohindra
patent: 7254379 (2007-08-01), Xu et al.
patent: 7305037 (2007-12-01), Josefsson et al.
patent: 7512171 (2009-03-01), Barnes et al.
patent: 2002/0032039 (2002-03-01), Kimata
patent: 2002/0042256 (2002-04-01), Baldwin
patent: 2002/0097081 (2002-07-01), Razavi et al.
patent: 2002/0197975 (2002-12-01), Chen
patent: 2003/0064697 (2003-04-01), Twomey
patent: 2003/0156668 (2003-08-01), Atkinson et al.
patent: 2003/0223480 (2003-12-01), Cafarella
patent: 2004/0082302 (2004-04-01), Shippee
patent: 2004/0106380 (2004-06-01), Vassiliou et al.
patent: 2005/0141634 (2005-06-01), Lin
patent: 2006/0094386 (2006-05-01), Darabi et al.
patent: 0719013 (1996-06-01), None
patent: 0964557 (1999-12-01), None
patent: 10093647 (1998-04-01), None
patent: 10308684 (1998-11-01), None
patent: WO98/43357 (1998-10-01), None
patent: WO2004038939 (2004-05-01), None
International Search Report and Written Opinion—PCT/US2006/038534, International Search Authority—European Patent Office—Jun. 12, 2006.

Affiliated with

Also associated with

Rating

DC offset cancellation circuit for a 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 DC offset cancellation circuit for a receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC offset cancellation circuit for a receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4253523