High band width, high gain offset compensating amplifier system

Details High band width, high gain offset compensating amplifier system High band width, high gain offset compensating amplifier system

1998-07-30

1999-12-21

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327560, H03L 500

Patent

active

06005431&

ABSTRACT:
A method and system for high bandwidth, high gain offset compensation in a read channel integrated circuit includes zeroing the analog read signal applied to the signal path at a first location in the read channel integrated circuit path prior to a first amplifier which has a first gain and a first bandwidth magnitude characteristic with a high frequency boost; coupling a signal from the first amplifier to a second amplifier which has a second gain larger than the first and a second bandwidth magnitude characteristic having high frequency roll-off; and further coupling the signal further from the second amplifier to a storage device and feeding back the signal stored in the storage device to the first amplifier to apply the high frequency boost of the first bandwidth magnitude characteristic to compensate for the high frequency roll-off of the second bandwidth magnitude characteristic; decoupling the signal from the storage device and removing the zeroing of the analog read signal applied to the signal path.

REFERENCES:
patent: 4514706 (1985-04-01), Thompson
patent: 4587443 (1986-05-01), Plassche
patent: 5392001 (1995-02-01), Uhling et al.
patent: 5508656 (1996-04-01), Jaffard et al.
patent: 5648738 (1997-07-01), Welland et al.

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