Amplifiers – With periodic switching input-output
Reexamination Certificate
2007-08-28
2007-08-28
Nguyen, Khanh Van (Department: 2817)
Amplifiers
With periodic switching input-output
C330S051000
Reexamination Certificate
active
11036082
ABSTRACT:
An operational amplifier including at least one amplifier stage and chopping circuitry for chopping an input signal to the amplifier stage and an output signal from the chopping signal having a frequency randomly varying within the selected frequency band.
REFERENCES:
patent: 5115202 (1992-05-01), Brown
patent: 5926066 (1999-07-01), Sauer
patent: 6064257 (2000-05-01), Sauer
patent: 6130578 (2000-10-01), Tang
patent: 6188294 (2001-02-01), Ryan et al.
patent: 6201835 (2001-03-01), Wang
patent: 6262626 (2001-07-01), Bakker et al.
patent: 6307430 (2001-10-01), Thomsen
patent: 6414558 (2002-07-01), Ryan et al.
patent: 6788136 (2004-09-01), McGrath
Thomsen A. et a.l.: “A Fivo Stago Choppor Stabilizod Instrumentation Amplifier Using Feedforward Compensation” VLSI Circuits, 1998. Digest of Technical Papers. 1998.
Symposium on Honolulu, HI, USA Jun. 11-13, 1998, New York, NY, IEEE, US, Jun. 11, 1998 pp. 220-223, XP 010291208.
K.C. Hsieh et al.: “A Low-Noise Chopper-Stabilized Differential Switched-Capacitor Filtering Technique”, IEEE Journal of Solid Sgtate Circuits, vol. SC-16, No. 6, Jan. 12, 1981 pp. 708-715, XP002379911.
Wang, C.B.: “A 20-bit 25-kHz delta-sigma A/D converter utilizing a frequency-shaped chopper stabilization scheme”, IEEE Journal of Solid-State Circuits, vol. 36, No. 3, Mar. 3, 2001, pp. 566-569.
Kejariwal Murari
Melanson John Laurance
Vemulapalli Gowtham
Cirrus Logic Inc.
Murphy James J.
Nguyen Khanh Van
Thompson & Knight LLP
LandOfFree
Circuits and methods for minimizing chopping artifacts at... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuits and methods for minimizing chopping artifacts at..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuits and methods for minimizing chopping artifacts at... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3876032