Apparatus for biasing a complementary metal-oxide...

Details Apparatus for biasing a complementary metal-oxide... Apparatus for biasing a complementary metal-oxide...

2006-06-02

2008-08-05

Mottola, Steven J (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

07408410

ABSTRACT:
A bias generation circuit for biasing a differential amplifier is disclosed. The bias generation circuit is coupled to the differential amplifier. After determining a common-mode voltage of a pair of differential outputs from the differential amplifier, the bias generation circuit generates a bias voltage, which is proportional to the determined common-mode voltage, to the differential amplifier such that the common-mode input voltage range of the differential amplifier is extended to as far as the rail-to-rail voltage.

REFERENCES:
patent: 4797631 (1989-01-01), Hsu et al.
patent: 6774722 (2004-08-01), Hogervorst
patent: 7253686 (2007-08-01), Ali

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