Data recovery procedure using DC offset and gain control for tim

Details Data recovery procedure using DC offset and gain control for tim Data recovery procedure using DC offset and gain control for tim

1993-06-29

1995-08-15

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

054424925

ABSTRACT:
Apparatus and method of data recovery are provided for data detection in a partial-response (PR) data channel. The PR data channel includes an analog-to-digital converter (ADC) for providing digital samples of a readback data signal and a voltage controlled oscillator (VCO) timing control coupled to the ADC. A data recovery procedure (DRP) is established responsive to a detected readback error. Using amplitude offset circuitry, amplitude of the readback data signal is selectively adjusted responsive to the detected readback error; and using gain control, a correction current applied to the VCO timing control is changed responsive to the detected readback error.

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