Filter for disk drive bi-phase servo demodulation

Details Filter for disk drive bi-phase servo demodulation Filter for disk drive bi-phase servo demodulation

2005-08-09

2005-08-09

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

Reexamination Certificate

active

06927932

ABSTRACT:
An apparatus comprising a sampler circuit and a filter circuit. The sampler circuit may be configured to generate a digital signal in response to a pre-amplified signal. The filter circuit may be configured to generate a track ID signal in response to the digital signal. The filter circuit may also be configured to (i) improve or increase signal-to-noise ratio (SNR) and (ii) reject DC offset errors.

REFERENCES:
patent: 5341249 (1994-08-01), Abbott et al.
patent: 5442498 (1995-08-01), Cheung et al.
patent: 6122120 (2000-09-01), Shimoda
patent: 6160673 (2000-12-01), Izumi et al.
patent: 6590728 (2003-07-01), Yang

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