Multi-path common mode feedback for high speed multi-stage...

Details Multi-path common mode feedback for high speed multi-stage... Multi-path common mode feedback for high speed multi-stage...

2006-08-01

2008-11-18

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

07453319

ABSTRACT:
The invention includes methods and systems for providing a multi-path common mode feedback loop in an amplifier system. Embodiments include techniques for dividing a common mode feedback current path to provide a slow common mode feedback current path and a fast common mode feedback current path. The slow and fast paths are configured for controlling common mode feedback current within a small bandwidth.

REFERENCES:
patent: 4825173 (1989-04-01), Cornett
patent: 6388522 (2002-05-01), Fattaruso et al.
patent: 6617921 (2003-09-01), Forejt
patent: 6774722 (2004-08-01), Hogervorst
A.K. Gupta et al., Multipath common-mode feedback scheme suitable for high-frequency two-stage amplifiers, IEEE Electronics Letters, Apr. 27th, 2006, vol. 42 No. 9.

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