Operational amplifier

Details Operational amplifier Operational amplifier

2007-03-20

2009-02-10

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S255000, C330S263000

Reexamination Certificate

active

07489193

ABSTRACT:
A disclosed operational amplifier includes: a pair of differential stages; a cascode amplifier stage; and an output stage. A threshold voltage of an output transistor constituting the output stage is higher than a threshold voltage of other transistors.

REFERENCES:
patent: 6531921 (2003-03-01), Horie
patent: 6657495 (2003-12-01), Ivanov et al.
patent: 6714076 (2004-03-01), Kalb
patent: 7187235 (2007-03-01), Moon
patent: 7202738 (2007-04-01), Huijsing et al.
patent: 7262662 (2007-08-01), Adachi
patent: 2001-274642 (2001-10-01), None
patent: 2001-339257 (2001-12-01), None

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