Dual feedback linear amplifier

Details Dual feedback linear amplifier Dual feedback linear amplifier

2006-06-13

2006-06-13

Shingleton, Michael B (Department: 2817)

Amplifiers

Signal feedback

Multiple feedback paths

C330S109000, C330S294000, C330S107000, C330S110000, C327S345000

Reexamination Certificate

active

07061313

ABSTRACT:
A dual feedback topology imparts stability to a multistage linear amplifier, particularly by improving overall amplifier phase margin at higher signal frequencies. With dual feedback, an inner feedback loop is closed around the first amplifier stage, which stage is configured as a current feedback amplifier. A second feedback loop is closed around the overall multistage amplifier. With a current feedback amplifier as the initial stage, the two feedback signals are current-mode signals and thus add to form the combined feedback signal. The frequency responses of the inner and outer feedback loops may be tailored for flat frequency response, or, where desired, may be adjusted to compensate or otherwise flatten overall amplifier frequency response.

REFERENCES:
patent: 4415868 (1983-11-01), Gross
patent: 5317277 (1994-05-01), Gavigelli
patent: 5708376 (1998-01-01), Ikeda
patent: 5737697 (1998-04-01), Yamada
patent: 5936464 (1999-08-01), Grondahl
patent: 6043707 (2000-03-01), Budnik
patent: 6300826 (2001-10-01), Mathe et al.
patent: WO 9630998 (1996-10-01), None
patent: WO 9702655 (1997-01-01), None
IEEE Standard Dictionary of Electrical and Electronics Terms Third Edition Copyright 1984 p. 219.

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