Signal compensation for high-speed optical storage device
AssigneeVIA Technologies, Inc.
InventorMeng-Huang Chu
Life of this patent
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Abstract
A device for compensating the error signal produced by a high-speed disk system. The error signal is fed to a compensator and a bandpass filter respectively. The processed signals produced by the compensator and the bandpass filter are summed to output a compensated signal. The bandpass filter processes the rotating frequency portion of the error signal. The compensator includes a lead compensator and a lag compensator either serially connected or parallel connected.
Claims18
A compensation device for compensating an error signal in an optical storage device, comprising:
- a lead compensator for receiving the error signal and generating a lead compensated error signal;
- a lag compensator for receiving the lead compensated error signal and generating a lead-lag compensated error signal based on the error signal;
- and
- a bandpass filter for magnifying a rotating frequency portion of the error signal and generating a filtered error signal,
- wherein the lead compensated error signal and the lead-lag compensated error signal are summed for lowering a steady state error of the error signal.
A compensation device for compensating the error signal of an optical storage device, comprising:
- a lead compensator for receiving the error signal and generating a lead compensated error signal;
- a lag compensator for receiving the error signal and generating a lag compensated error signal;
- and
- a bandpass filter for magnifying a rotating frequency portion of the error signal and generating a filtered error signal based on the error signal,
- wherein the lead compensated error signal, the lag compensated error signal and the filtered error signal are summed for lowering a steady state error of the error signal.
A method for compensating an error signal applied in an optical storage device, comprising the steps of:
- generating a lead-compensated error signal according to the error signal;
- generating a lag-compensated error signal according to the error signal;
- generating a filtered error signal according to the error signal;
- and
- summing the lead-compensated error signal, the lag-compensated error signal, and the filtered error signal for lowering a steady state error of the error signal.
A method for compensating an error signal, applied in an optical storage device, comprising the steps of:
- generating a lead-compensated error signal according to the error signal;
- generating a filtered error signal according to the error signal;
- generating a lead-lag-compensated signal according to the lead-compensated signal;
- and
- summing the filtered error signal and the lead-lag compensated error signal for lowering a steady state error of the error signal.
Dependencies are inferred from the claim text.