Method and system for generating a feedback signal in optical disc drives
AssigneeLite-On It Corporation
InventorHsin-Ping Cheng
Life of this patent
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Abstract
A method for generating a feedback signal in optical disc drives is disclosed. Firstly RF signal is generated by a pickup head and coupled to a converter to generate a digital signal. Then a detector generates a plurality of pseudo-jitter according to the digital signal. Thereafter a calculator receives the said pseudo-jitter and calculates for outputting a feedback signal to the pickup head.
Claims22
A method for generating a feedback signal in an optical disc drive, comprising:
- receiving an RF (Radio Frequency) signal;
- digitizing said RF signal for generating a digital signal;
- adjusting said digital signal from an original level to a predefined level;
- detecting a plurality of pseudo-jitters of said adjusted digital signal;
- and
- generating a feedback signal, wherein said generating comprises computing the root mean square of said plurality of pseudo-jitters for generating said feedback signal.
A method for generating a feedback signal in an optical disc drive, comprising:
- receiving an RF (Radio Frequency) signal;
- digitizing said RF signal for generating a digital signal;
- adjusting said digital signal from an original level to a predefined level;
- detecting a plurality of pseudo-jitters of said adjusted digital signal;
- and
- generating a feedback signal, wherein said generating comprises computing the arithmetic mean of said plurality of pseudo-jitters for generating said feedback signal.
A feedback system for an optical disc drive, comprising:
- a pickup head generating a RF signal;
- a converter coupled to said RF signal for generating a digital signal;
- a detector receiving said digital signal for generating a plurality of pseudo-jitters;
- and
- a calculator receiving said plurality of pseudo-jitters and having a calculation for generating a feedback signal to control said pickup head, wherein said calculation is computing the root mean square of said plurality of pseudo-jitters.
A feedback system for an optical disc drive, comprising:
- a pickup head generating an RF signal;
- a converter coupled to said RF signal for generating a digital signal;
- a detector receiving said digital signal for generating a plurality of pseudo-jitters;
- and
- a calculator receiving said plurality of pseudo-jitters and having a calculation for generating a feedback signal to control said pickup head, wherein said calculation is computing the arithmetic mean of said plurality of pseudo-jitters.
Dependencies are inferred from the claim text.