Low power low noise amplifier for a magnetoresistive sensor

Details Low power low noise amplifier for a magnetoresistive sensor Low power low noise amplifier for a magnetoresistive sensor

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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patent: 6788142 (2004-09-01), Li et al.
patent: 7113359 (2006-09-01), Hashizume et al.
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.

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