Track detector circuit for detecting a track when at least eithe

Details Track detector circuit for detecting a track when at least eithe Track detector circuit for detecting a track when at least eithe

1993-05-28

1995-06-13

Epps, Georgia Y.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 44410, 369 44420, 369 44350, 369120, G11B 713

Patent

active

054250129

ABSTRACT:
In a guide pattern detecting circuit installed in a tracking control circuit, a sum of outputs of guide pattern light receiving elements, .SIGMA.En, is converted from a current into a voltage by an I-V converter. The sums of outputs of odd-numbered light receiving elements for clock signal production and of even-numbered light receiving elements for clock signal production, .SIGMA.B2n-1 and .SIGMA.B2n, are converted from currents into voltages by I-V converters 31b and 31c. The sums of outputs converted from currents into voltages, En, and B2n-1 and B2n are supplied to two differential amplifiers. One of the amplifiers outputs (.SIGMA.En-.SIGMA.B2n-1), and the other one thereof outputs (.SIGMA.En-.SIGMA.B2n). The differential outputs (.SIGMA.En-.SIGMA.B2n-1) and (.SIGMA.En-.SIGMA.B2n) are supplied to two low filters, whereby dc components are cut off. These differential signals are supplied to two multipliers and then squared. The squared signals are then added up by an adder, thus providing a sum-of-squares output. The sum-of-squares signal becomes an input of a reversed terminal of a comparator. The comparator compares the input of the reversed terminal with a reference value V.sub.TH fed to the unreversed terminal, and then outputs a guide pattern detected signal Gdet.

REFERENCES:
patent: 5155718 (1992-10-01), Hashimoto et al.
patent: 5157249 (1992-10-01), Hashimoto
patent: 5168487 (1992-12-01), Ohsato et al.
patent: 5191571 (1993-03-01), Fukumoto et al.

Affiliated with

Also associated with

Rating

Track detector circuit for detecting a track when at least eithe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Track detector circuit for detecting a track when at least eithe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Track detector circuit for detecting a track when at least eithe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1316062