Amplitude level controller for head IC, read circuit and...

Details Amplitude level controller for head IC, read circuit and... Amplitude level controller for head IC, read circuit and...

2008-08-27

2010-11-09

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S046000

Reexamination Certificate

active

07830633

ABSTRACT:
A head IC adjusts an amplitude level of a read signal of a head and outputs to a read channel having an AGC amplifier, includes an AGC amplifier. The AGC amplifier has a feedback loop control type first amplifier and a feed-forward control type second amplifier. The precision of control with respect to a target value is improved, and an AGC amplifier with fast response can be configured. Further, increases in the AGC pull-in type can be prevented, stability can be assured, and erroneous AGC judgments can be prevented.

REFERENCES:
patent: 5955921 (1999-09-01), Ide et al.
patent: 6018554 (2000-01-01), Glover
patent: 2008/0100944 (2008-05-01), Matsui et al.
patent: 2008/0123212 (2008-05-01), Amemiya
patent: A 60-114008 (1985-06-01), None
patent: A 10-21647 (1998-01-01), None

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