Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1995-01-20
1996-03-05
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330255, 330311, H03F 345
Patent
active
054971225
ABSTRACT:
An amplifier circuit having four variable impedance nodes is provided. The amplifier has split transconductance current paths. Each half of the amplifier has two such current paths and each current path has a node which may be either a high impedance or low impedance node. Connected between the two nodes is a transistor which is utilized in driving the nodes to their either high or low impedance state. The invention is particularly useful in a folded cascode amplifier used for driving loud speakers. However, the circuitry may also be used in other amplifiers or other applications.
REFERENCES:
patent: 4988954 (1991-01-01), Stern et al.
patent: 5177450 (1993-01-01), Lee et al.
patent: 5212455 (1993-05-01), Pernici et al.
patent: 5239210 (1993-08-01), Scott
patent: 5281924 (1994-01-01), Maloberti et al.
patent: 5285168 (1994-02-01), Tomatsu et al.
Eynde, Frank N. L.; Ampe, Patrick F. M.; Verdeyen, Lode; and Sansen, Willy M.C., "A CMOS Large-Swing Low-Distortion Three-Stage Class AB Power Amplifier", IEEE Journal of Solid-State Circuits, vol. 25, Feb. 1990.
Stern, Kenneth J.; Sooch, Nav S.; Knapp, David J.; Nix, Michael A. "A Monolithic Line Interface Circuit for T1 Terminals", IEEE International Solid-State Circuits Conference, pp. 292-293, 1987.
Gray, Paul R. and Meyer, Robert G., "Analysis and Design of Analog Integrated Circuits" John Wiley & Sons, p. 753, 1984.
Hein, Jerrell P. and Starke, Richard J., "A Single-Chip Digital Signaling Interface for the DSI Intraoffice Environment", IEEE International Solid-State Circuits Conference, pp. 148-149, 1989.
Tsividis, Yannis, "Design of Mos VlSI Circuits for Telecommunications" Prentice-Hall, Inc. pp. 560-561, 1985.
Hogervorst, Ron; Tero, John P.; Eschauzier, Ruud, G. H.; and Hujsing, Johan H., "A Compact Power-Efficient 3V CMOS Rail-to-Rail Input/Output Operational Amplifier for VLSI Cell Libraries", IEEE International Solid-State Circuits Conference, pp. 244-245, 1994.
Crystal Semiconductor
Mullins James B.
LandOfFree
Low power class-AB integrated circuit 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 Low power class-AB integrated circuit amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low power class-AB integrated circuit amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1415413