Inventors:
Timothy A. Madsen - Bloomington MN
Russell J. Machelski - Bloomington MN
Assignee:
Seagate Technology, Inc. - Scotts Valley CA
International Classification:
G11B 509
G11B 503
Abstract:
A DC offset voltage is added to the analog timing signal in a peak detection data recovery circuit to cancel the timing asymmetry from a magnetoresistive head signal. An AC timing asymmetry cancellation circuit uses a charge pump, buffer amplifier and resistor divider to produce the proper DC offset voltage automatically.