Low-power read channel for magnetic mass storage systems

Details Low-power read channel for magnetic mass storage systems Low-power read channel for magnetic mass storage systems

2007-10-31

2010-06-01

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

Reexamination Certificate

active

07729075

ABSTRACT:
An improved mass storage system having a read channel adapted to store in a FIFO memory digitized analog samples of data symbols read from a disk, the buffered digitized samples being processed by digital circuitry that may be operated at a slower speed than the maximum symbol rate from the disk. In one embodiment, the read channel has an analog portion that processes analog signals from a read head and includes an ADC for converting the processed analog signals into digital samples in response to a first clock; a FIFO storing therein the digital samples in response to the first clock and reading out the stored digital samples in response to a second clock; and a detector, in response to the second clock, detecting the digital samples from the FIFO into digital data. The maximum frequency of the first clock is less than the maximum frequency of the second clock.

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