Tracking control system of an optical pick-up

Details Tracking control system of an optical pick-up Tracking control system of an optical pick-up

1986-07-01

1989-03-28

Shoop, Jr., William M.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 43, 369 44, 360 722, G11B 2108

Patent

active

048170690

ABSTRACT:
A tracking control system for controlling a relative positional relation between an optical pick-up and a rotating optical disc is provided. A tracking error signal is supplied to a low pass filter, to a lead phase compensating circuit and also to a zero cross comparator which supplies its output to a pulse generating circuit. During a normal tracking mode, in which the optical pick-up is maintained in alignment with a recording track of the rotating disc, an output from the low pass filter and an output from the lead phase compensating circuit are added to define a feed-back signal which is then supplied to the optical pick-up. On the other hand, during a track jump control mode, in which the optical pick-up is caused to jump to the next adjacent recording track, with the lead compensating circuit maintained in an inhibited state, an acceleration pulse is generated from the pulse generating circuit and then a deceleration pulse opposite in polarity is generated from the pulse generating circuit in response to an output from the zero cross comparator, wherein the output of the low pass filter is added with the acceleration and deceleration pulses to define a feed-back signal to be applied to the optical pick-up.

REFERENCES:
patent: 4519056 (1985-05-01), Kimoto et al.
patent: 4539664 (1985-09-01), Deguchi et al.
patent: 4598394 (1986-07-01), Nonaka
patent: 4608676 (1986-08-01), Yoshida et al.
patent: 4616354 (1986-10-01), Yoshida
patent: 4677603 (1987-06-01), Kenjyo
patent: 4689779 (1987-08-01), Hayashi et al.
patent: 4698796 (1987-10-01), Kimura
patent: 4703408 (1987-10-01), Yonezawa et al.
patent: 4731771 (1988-03-01), Maeda et al.
patent: 4744069 (1988-05-01), Sugiyama et al.

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