Operational amplifier

Details Operational amplifier Operational amplifier

2010-01-11

2011-12-06

Nguyen, Hieu (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S258000, C330S260000

Reexamination Certificate

active

08072268

ABSTRACT:
An operational amplifier has an input stage that branches a first current according to first and second input signals. An output stage generates an output signal from a second current and one of the branch currents in the input stage. A first transistor supplies the first current to the input stage. A second transistor supplies the second current to the output stage. A first gate line supplies a first bias potential to the gate terminal of the first transistor. A second gate line supplies a second bias potential to the gate terminal of the second transistor. The first gate line and the second gate line are electrically isolated from each other, preventing unwanted feedback of the output signal to the input stage by leakage through the gate lines.

REFERENCES:
patent: 7215199 (2007-05-01), Marholev
patent: 7592870 (2009-09-01), Wang et al.
patent: 7741911 (2010-06-01), Kao et al.
patent: 2008/0315951 (2008-12-01), Rysinski et al.
patent: 07-086850 (1995-03-01), None

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