Disk clock system with up-sampler to generate frequency offset

Details Disk clock system with up-sampler to generate frequency offset Disk clock system with up-sampler to generate frequency offset

2011-01-04

2011-01-04

Mercedes, Dismery E (Department: 2627)

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

C360S029000, C360S032000, C360S065000

Reexamination Certificate

active

07864464

ABSTRACT:
A system reads data from a magnetic storage media. A read head reads data from the magnetic storage media and produce an analog signal. A variable gain amplifier amplifies the analog signal. An offset adjust module substantially centers the amplified analog signal to a midscale. A Magneto Resistive Asymmetry (MRA) correction module MRA corrects the amplified analog signal. A Continuous Time Filter (CTF) compensation module processes the amplified analog signal. An Analog to Digital Converter (ADC) samples the amplified analog signal based upon a control signal to produce a digital signal. A Disk Lock Clock (DLC) system produces the control signal to the ADC. The control signal is representative of a frequency offset caused by at least one servo wedge rate error. A Finite Impulse Response (FIR) filter module filters the digital signal. A sequence detector processes the digital signal and detects a bit sequence from the digital signal.

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