Direct conversion receiver with direct current offset...

Details Direct conversion receiver with direct current offset... Direct conversion receiver with direct current offset...

2007-03-27

2007-03-27

Patel, Jay K. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C330S300000, C341S118000, C455S130000, C455S131000

Reexamination Certificate

active

10430656

ABSTRACT:
A direct conversion circuit that includes an in-phase and quadrature-phase feedback path that reduces Direct Current (DC) offset. Each feedback path includes a compensating mixer that generates an error correction voltage that is passed through a loop gain circuit and an integrator. The integrated signal is applied to the output of a low pass filter that operates on the down-converted baseband signal. The direction conversion circuit may not only down convert the received modulated signal using a down-converting mixer into a baseband signal, but also, after performing a passive low pass filtering to remove higher-order components, performs up-conversion of the baseband signal using an up-converting mixer. This allows active elements operating on the up-converted signal to introduce less 1/f noise.

REFERENCES:
patent: 3961262 (1976-06-01), Gassmann
patent: 4276513 (1981-06-01), Johnston et al.
patent: 4599743 (1986-07-01), Reed
patent: 4736390 (1988-04-01), Ward et al.
patent: 4814715 (1989-03-01), Kasperkovitz
patent: 4942365 (1990-07-01), Satterwhite
patent: 4944025 (1990-07-01), Gehring et al.
patent: 4961206 (1990-10-01), Tomlinson et al.
patent: 5086437 (1992-02-01), Tomita
patent: 5241702 (1993-08-01), Dent
patent: 5263194 (1993-11-01), Ragan
patent: 5442655 (1995-08-01), Dedic et al.
patent: 5461646 (1995-10-01), Anvari
patent: 5501903 (1996-03-01), Erkkila et al.
patent: 5510187 (1996-04-01), Kumar et al.
patent: 5530926 (1996-06-01), Rozanski
patent: 5561673 (1996-10-01), Takai et al.
patent: 5617060 (1997-04-01), Wilson et al.
patent: 5634204 (1997-05-01), Takahashi et al.
patent: 5692019 (1997-11-01), Chang et al.
patent: 5740530 (1998-04-01), Labedz et al.
patent: 5818543 (1998-10-01), Lee
patent: 5827600 (1998-10-01), Ejiri et al.
patent: 5889826 (1999-03-01), Takahashi
patent: 5953640 (1999-09-01), Meador et al.
patent: 6002672 (1999-12-01), Todd
patent: 6009307 (1999-12-01), Granata et al.
patent: 6018647 (2000-01-01), Fitzgerald
patent: 6023615 (2000-02-01), Bruckert et al.
patent: 6029058 (2000-02-01), Namgoong et al.
patent: 6085076 (2000-07-01), Lindsay et al.
patent: 6099895 (2000-08-01), Mayo et al.
patent: 6148184 (2000-11-01), Manku et al.
patent: 6172970 (2001-01-01), Ling et al.
patent: 6175728 (2001-01-01), Mitama
patent: 6188880 (2001-02-01), Sanielevici
patent: 6192225 (2001-02-01), Arpaia et al.
patent: 6212244 (2001-04-01), Davidovici et al.
patent: 6225848 (2001-05-01), Tilley et al.
patent: 6246867 (2001-06-01), Jakobsson
patent: 6249249 (2001-06-01), Obayashi et al.
patent: 6275542 (2001-08-01), Katayama et al.
patent: 6327313 (2001-12-01), Traylor et al.
patent: 6330433 (2001-12-01), Jager
patent: 6516185 (2003-02-01), MacNally
patent: 2003/0174079 (2003-09-01), Soltanian et al.
C. Menolfi and Q. Huang, “A Low-Noise CMOS Instrumentation Amplifier for Thermoelectric Infrared Detectors”, IEEE J. Solid-State Circuits, vol. 32, No. 7, pp. 968-976, Jul. 1997.
C.C.Enz, E.A. Vittoz, and F. Krummenacher, ‘A CMOS Chopper Amplifier’, IEEE J. Solid-State Circuits, vol. SC-22, No. 3, pp. 335-342, Jul. 1987.
D.K. Weaver, Jr., “Third Method of Generation and Detection of Single-Sideband Signals”, Proc. IRE, pp. 1703-1705, Jun. 1956.

Affiliated with

Also associated with

Rating

Direct conversion receiver with direct current offset... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3788119