Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2011-06-07
2011-06-07
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S051000, C330S295000, C330S302000
Reexamination Certificate
active
07956685
ABSTRACT:
A buffer varies the size of its output stage in response to a varying capacitive load. The capacitive load may vary in a predictable or a random manner. The buffer includes an operational amplifier having an output stage of multiple transistors, selectively connected in parallel. During operation, data regarding the size of the capacitive load is obtained and used to determine the size of the output stage. In general, as the capacitive load increases, the number of transistors connected in parallel at the output stage also increases.
REFERENCES:
patent: 5338977 (1994-08-01), Carobolante
patent: 5541555 (1996-07-01), Pernici
patent: 5867778 (1999-02-01), Khoury et al.
patent: 6518737 (2003-02-01), Stanescu et al.
patent: 6657498 (2003-12-01), Park et al.
patent: 6885331 (2005-04-01), Krymski
patent: 7075470 (2006-07-01), Lee
patent: 7091785 (2006-08-01), Deval et al.
patent: 7135934 (2006-11-01), Sanchez et al.
patent: 7170341 (2007-01-01), Conrad et al.
patent: 7202733 (2007-04-01), Aram et al.
patent: 7282685 (2007-10-01), Boemier
patent: 7292098 (2007-11-01), Chen et al.
patent: 7389087 (2008-06-01), Darabi et al.
patent: 7486135 (2009-02-01), Mu
patent: 7535299 (2009-05-01), Tanaka
patent: 7570116 (2009-08-01), Haila et al.
patent: 7643573 (2010-01-01), Kejariwal et al.
patent: 7683708 (2010-03-01), Koch
patent: 7786806 (2010-08-01), Duperray
patent: 2002/0122129 (2002-09-01), Lee
patent: 2006/0055383 (2006-03-01), Eberlein
patent: 0 446 652 (1991-09-01), None
Xuguang Zhang et al., A Novel Low-voltage Operational Transconductance Amplifier and its Applications, ISCAS 2000=IEEE International Symposium on Circuits and Systems, May 28-31, 2000, Geneva, Switzerland.
Byungsub Kim, et al., Power-Adaptive Operational Amplifer with Positive-Feedback Self Biasing, Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology, Cambridge, USA, ISCAS 2006, Feb. 6, 2006.
Bhupendra K. Ahuja, An Improved Frequency Compensation Technique for CMOS Operational Amplifiers, IEEE Journal of Solid-State Circuit, vol. SC-18, No. 6, Dec. 1983.
Ludwig G.A. Callewaert et al, Class AB CMOS Amplifiers with High Efficiency, IEEE Journal of Solid-State Circuits, vol. 25, No. 3 Jun. 1990.
Micro)n Technology, Inc.
Nguyen Patricia
RatnerPrestia
LandOfFree
Adaptive operational transconductance amplifier load... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive operational transconductance amplifier load..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive operational transconductance amplifier load... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2692739