Tracking control system for an information reproducing apparatus

Details Tracking control system for an information reproducing apparatus Tracking control system for an information reproducing apparatus

1985-02-14

1987-08-18

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 2110

Patent

active

046882022

ABSTRACT:
An information reproducing apparatus for tracking control has a high-pass filter and a low-pass filter of closed loops connected in parallel to each other and has a storage quantity control circuit which controls an input signal of the high-pass filter in response to a defect detection signal which detects a defective portion of an information recording medium and is outputted from a defect detection circuit. The storage quantity of a capacitor included in the high-pass filter, or of a storage element operable equivalently to the capacitor, is equal to the storage quantity when the high-pass filter is fed a signal having previously been fed to the high-pass filter but without its high frequency component. Even when a speed error is created in an actuator due to pulse-like noises caused by a delay in the defect detection caused by the defect detection circuits, the speed error is removable just after the defect is detected, thereby obtaining the effect such that the tracking control is not so easily disturbed by the defect and operates stably.

REFERENCES:
patent: 4406000 (1983-09-01), Shoji et al.
patent: 4484319 (1984-11-01), Koishi et al.
patent: 4494154 (1985-01-01), Akiyama
patent: 4506149 (1985-03-01), Utsumi
patent: 4556965 (1985-12-01), Tsunoda et al.
patent: 4580255 (1986-04-01), Inoue et al.

Affiliated with

Also associated with

Rating

Tracking control system for an information reproducing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tracking control system for an information reproducing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking control system for an information reproducing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1122201