Differential amplifier with adaptive biasing and offset...

Details Differential amplifier with adaptive biasing and offset... Differential amplifier with adaptive biasing and offset...

2006-06-06

2006-06-06

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S009000, C330S257000, C330S258000

Reexamination Certificate

active

07057460

ABSTRACT:
A differential amplifier with adaptive biasing and offset cancellation is disclosed. In one particular exemplary embodiment, the differential amplifier may comprise a first electrical path comprising a first transistor and a first resistance element, and a second electrical path comprising a second transistor and a second resistance element, where the first and the second electrical paths are coupled to a voltage source on one end and to a current source on the other end. The differential amplifier may further comprise a first adjustable current source coupled between the voltage source and a first node located between the first transistor and the first resistance element, and a second adjustable current source coupled between the voltage source and a second node located between the second transistor and the second resistance element, wherein the first and second adjustable current sources provide biasing currents for the two electrical paths.

REFERENCES:
patent: 5434544 (1995-07-01), Van Veenendaal
patent: 5912583 (1999-06-01), Pierson et al.
patent: 6369652 (2002-04-01), Nguyen et al.
patent: 6388494 (2002-05-01), Kindt et al.
patent: 6753732 (2004-06-01), Moreland

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