Track kick device in a disc recording and reproducing apparatus

Details Track kick device in a disc recording and reproducing apparatus Track kick device in a disc recording and reproducing apparatus

1995-12-22

1997-06-17

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, G11B 7085

Patent

active

056403763

ABSTRACT:
A track kick device for a disc recording and reproducing device includes a direction determination device 1 outputting a forward pulse FWD or a backward pulse BWD according to a relation in phase between a pit position signal HFD and a tracking error signal TER, a track counter 2 counting the pulse FWD to increase its count value, the pulse BWD to decrease it, and a phase comparator 4, and a reference pulse generator 3 outputting a reference pulse for determining a speed of movement for the pickup. In the case of a track count mode, the phase comparator 4 outputs an acceleration pulse KP+ or a deceleration pulse KP- so that the tracking error signal TER is synchronous with the reference pulse, and in the case where a brake mode is effected in which the count value represents the aimed track, the phase comparator 4 outputs a brake pulse so that those signals HFD and TER indicates the on-track state of the pickup.

REFERENCES:
patent: 5072434 (1991-12-01), Uchikoshi et al.
patent: 5184338 (1993-02-01), Shimoda et al.
patent: 5327410 (1994-07-01), Gleim et al.
patent: 5371726 (1994-12-01), Suzuki
patent: 5394386 (1995-02-01), Park et al.
patent: 5408452 (1995-04-01), Sakemoto et al.

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