Amplifier for alternating signals superimposed on a...

Details Amplifier for alternating signals superimposed on a... Amplifier for alternating signals superimposed on a...

2005-04-05

2005-04-05

Nguyen, Patricia (Department: 2817)

Amplifiers

With periodic switching input-output

C330S282000, C330S292000

Reexamination Certificate

active

06876253

ABSTRACT:
This amplifier is intended for amplifying variable signals superimposed on a continuous signal. This continuous signal serves in particular for biasing a component, a magnetoresistive resistor used as a hard disk reading head. To avoid the harmful effects of a sudden fluctuation in the continuous signal, this amplifier comprises a set of switchable reactive elements (70) for acting on said transfer function and a bias drift compensation circuit (80) for controlling the switching of said switchable elements with a view to anticipating the effects of said fluctuation.

REFERENCES:
patent: 5079514 (1992-01-01), Mijuskovic
patent: 5369345 (1994-11-01), Phan et al.
patent: 5559646 (1996-09-01), Voorman et al.
patent: 5729230 (1998-03-01), Jensen et al.
patent: 6005742 (1999-12-01), Cunningham et al.
patent: 6281758 (2001-08-01), Elsayed et al.
patent: WO0124168 (2000-09-01), None

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