Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2005-10-06
2009-08-11
Mottola, Steven J (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C360S046000
Reexamination Certificate
active
07573331
ABSTRACT:
An amplifier for amplifying a differential input signal. The amplifier comprises a parallel configuration of a first and a second transistor differential amplifier, each responsive to a different DC bias current, wherein a gain of the amplifier is based on a sum of the transconductance of each of the first and the second differential amplifiers.
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Zheng, et al; “A 0.55nV/ Hz Gigabit Fully-Differential CMOS Preamplifer for MR/GMR Read Application”; ISSCC 2002, Session 3, Digital Signal Processors & Circuits.
Zheng, et al; “A 0.55nV/ Hz Gigabit Fully-Differential CMOS Preamplifer for MR/GMR Read Application”; ISSCC 2002 Visuals Supplement.
Agere Systems Inc.
Mottola Steven J
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