Circuit for DC offset cancellation

Details Circuit for DC offset cancellation Circuit for DC offset cancellation

2008-04-08

2008-04-08

Nguyen, Patricia (Department: 2817)

Amplifiers

With periodic switching input-output

C330S099000, C330S085000, C330S310000, C327S307000

Reexamination Certificate

active

07355471

ABSTRACT:
A circuit having multiple overlapped feedback loops for DC offset cancellation is provided with applying in one of multistage amplifier, multistage filter, and the combination thereof. The circuit includes a plurality of negative feedback variable bandwidth switches coupled to each stage of the above mentioned multistage devices, the output of the last stage is coupled to an input of a low-pass filter loop. The circuit includes a plurality of variable gain amplifiers, output of each variable gain amplifier is coupled to the series contact of each stage respectively, and input of each variable gain amplifier is thereof coupled to an output of the low-pass filter loop. Therefore, the circuit achieves to cancel the DC offset for multistage overlapped feedback path with less area and low power consumption.

REFERENCES:
patent: 6437643 (2002-08-01), Ueno et al.
patent: 6459889 (2002-10-01), Ruelke
patent: 6483355 (2002-11-01), Lee et al.
patent: 6516185 (2003-02-01), MacNally
patent: 7257385 (2007-08-01), Ono et al.
patent: 7262724 (2007-08-01), Hughes et al.

Affiliated with

Also associated with

Rating

Circuit for DC offset cancellation does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2774066