Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-04-30
2009-06-09
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S257000
Reexamination Certificate
active
07545214
ABSTRACT:
An operational amplifier including an input stage. The input stage may include first and second differential input circuits and a first current mirror. When an input terminal of the operational amplifier is at a positive voltage rail, the first differential input circuit may be activated. When the input terminal is at a negative voltage rail, the second differential input circuit may be activated. In either case, this may cause the first current mirror to provide a current of a predetermined value to each of first and second input terminals of a control circuit, and to each of first and second nodes coupled to a rail-to-rail output stage. The input stage may maintain the current provided to each of the input terminals of the control circuit and to each of the nodes coupled to the rail-to-rail output stage constant over the full input voltage range from the negative voltage rail to the positive voltage rail.
REFERENCES:
patent: 4766394 (1988-08-01), Yukawa
patent: 5371474 (1994-12-01), Wassenaar et al.
patent: 5568093 (1996-10-01), Holzer
patent: 5631607 (1997-05-01), Huijsing et al.
patent: 5909146 (1999-06-01), Okada
patent: 5917378 (1999-06-01), Juang
patent: 6384679 (2002-05-01), Lorenz
patent: 6542032 (2003-04-01), Escobar-Bowser et al.
patent: 6545538 (2003-04-01), Ivanov et al.
patent: 6879213 (2005-04-01), Darzy
patent: 7064609 (2006-06-01), Beck et al.
patent: 7102335 (2006-09-01), Solie
patent: 7102436 (2006-09-01), Sung
patent: 7187235 (2007-03-01), Moon
patent: 7339430 (2008-03-01), Chiu
patent: 7368984 (2008-05-01), Kirn
patent: 7375585 (2008-05-01), Trifonov et al.
patent: 2008/0024217 (2008-01-01), Chiu
Op 'T Eynde, et al.; “Analog interfaces for digital signal processing systems—Chapter 2—A Design Example: A CMOS Low-Distortion Class AB Power Amplifier”; Springer International Series in Engineering and Computer Science; Springer, 1st Edition; Jun. 1993; pp. 62-63.
McLeod Scott C.
Rallabandi Madan G.
Hood Jeffrey C.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Mottola Steven J
Standard Microsystems Corporation
LandOfFree
Class AB rail-to-rail input and output operational amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Class AB rail-to-rail input and output operational amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Class AB rail-to-rail input and output operational amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4054261