Operational amplifiers having low-power...

Details Operational amplifiers having low-power... Operational amplifiers having low-power...

2011-04-12

2011-04-12

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S260000, C330S302000

Reexamination Certificate

active

07924095

ABSTRACT:
An operational amplifier is provided. The operational amplifier includes a first transistor configured to receive a first input voltage, a second transistor configured to receive a second input voltage, and a current steering module coupled to first and second transistors and configured to receive a reference voltage. The first and second transistors form a differential pair. The first transistor, second transistor, and current steering module are configured such that a current is steered from the current steering module or to the current steering module based on common-mode voltages of the first and second input voltages and the reference voltage to set a common-mode output voltage of the operational amplifier.

REFERENCES:
patent: 5936469 (1999-08-01), Alexander et al.
patent: 6531907 (2003-03-01), Dooley et al.
patent: 7012450 (2006-03-01), Oner et al.
patent: 7397270 (2008-07-01), Luo et al.
patent: 7679444 (2010-03-01), Forejt
patent: 7714652 (2010-05-01), Mangudi et al.

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