Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate
2006-07-18
2006-07-18
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
C330S267000
Reexamination Certificate
active
07078973
ABSTRACT:
A bipolar rail-to-rail class-AB output stage that provides improved AC performance in low voltage applications. The bipolar output stage includes an input buffer stage, first and second complementary common emitter stages, and first and second control circuits biased and configured to assure class-AB operation of the first and second common emitter stages, respectively. The input of the bipolar output stage is applied to the input buffer stage, and the output of the bipolar output stage is provided by the second common emitter stage. The combination of the first common emitter stage and the first AB-control circuit operates as a current booster stage for the second common emitter stage, thereby obviating the need for a large power supply.
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Johan H. Huijsing, “Operational Amplifiers. Theory and Design”, Kluwer Academic Publishers, Boston, 2001, p. 156-159.
Johan H. Huijsing, “Compact Low-Voltage and High Speed CMOS, BICMOS and Bipolar Operational Amplifiers.”, Kluwer Academic Publishers, Boston, 1999, p. 225-227.
Dennis M. Monticelli A Quad CMOS Single-Supply Op Amp with Rail-to-Rail Output Swing:IEEE Journal of Solid-State Circuits, vol. SC-21, No. 6, Dec. 1986.
Brady III W. James
Nguyen Hieu
Pascal Robert
Stewart Alan K.
Telecky , Jr. Frederick J.
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