Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution
Patent
1996-12-19
1998-10-20
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Increasing converter resolution
341155, H03M 120
Patent
active
058253181
ABSTRACT:
An analog-to-digital converter circuit in a sampling data detection channel of a disk drive synchronously samples user data in the data track areas at a first quantization resolution and samples servo bursts from the spoke areas at a second quantization resolution effectively greater than said first quantization resolution. An offset circuit provides a predetermined analog offset signal to a combining circuit which combines it with an incoming analog signal to provide a composite signal during a spoke servo burst sampling interval. An analog-to-digital converter samples the composite signal during the servo spoke burst sampling interval, and synchronously samples the analog signal during a user data sampling interval. A digital averaging circuit averages the servo spoke samples over a predetermined averaging interval to provide averaged burst samples having increased bit resolution.
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Buch Bruce D.
Fisher Kevin D.
Patapoutian Ara
Chun Debra A.
Harrison David B.
Jean Pierre Peguy
Klauzinski Robert V.
Quantum Corporation
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