Jitter compensation system in a rotary recording medium reproduc

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track...

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G11B 2102

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active

045009813

ABSTRACT:
A jitter compensation system in a rotary recording medium reproducing apparatus having a reproducing transducer including a reproducing element for reproducing recorded signals from a rotary medium, where the rotary recording medium is recorded with an information signal and also recorded with reference signals for tracking control with predetermined periods, comprises a separation circuit for separating the reference signals from a signal reproduced by the reproducing transducer, a detection circuit for detecting the separated reference signals and obtaining a signal having a predetermined period and predetermined frequency, a standard signal supplying circuit for supplying a standard signal having a frequency equal to the predetermined frequency, a phase comparator for comparing phases of the predetermined frequency signal thus obtained and the standard signal supplied thereto, to produce a phase comparison error signal, and a displacing circuit for displacing the reproducing element of the reproducing transducer along a relative scanning direction with respect to the rotary recording medium, in response to the output error signal of the phase comparing means.

REFERENCES:
patent: 3711641 (1973-01-01), Palmer
patent: 3965482 (1976-06-01), Burrus
patent: 4190859 (1980-02-01), Kinjo
patent: 4415936 (1983-11-01), Sugiyama
patent: 4426692 (1984-01-01), Hirata

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