Tracking traverse control circuit for head unit of disc player

Details Tracking traverse control circuit for head unit of disc player Tracking traverse control circuit for head unit of disc player

1994-10-18

1996-08-20

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, 360 7805, 360 7806, G11B 700

Patent

active

055485693

ABSTRACT:
Provision is made of a traverse cycle measuring circuit for measuring the traverse cycle based on a signal CNIN obtained by digitalizing the tracking error signal at the time of a track traverse, a register in which any target value of the traverse cycle can be set, a circuit for comparing the measured traverse cycle and set target value, control circuits, for controlling the tracking and sled so that the detected speed of traverse converges to a target value, and counting circuits for counting the number of traversed tracks based on the signal CNIN, the target value of the register being reset to a value by which the speed of traverse is reduced when the count of the counting circuit reaches a number of tracks (N-.alpha.) smaller than the target number of tracks by exactly .alpha..

REFERENCES:
patent: 4901299 (1990-02-01), Nakatsu
patent: 4914725 (1990-04-01), Belser et al.
patent: 5063549 (1991-11-01), Yamamuro
patent: 5335214 (1994-08-01), Matoba et al.

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