Track traverse counting on an optical disk

Details Track traverse counting on an optical disk Track traverse counting on an optical disk

2006-05-16

2006-05-16

Young, W. R. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S030130, C369S030140

Reexamination Certificate

active

07046591

ABSTRACT:
An apparatus detects the number of tracks traversed on an optical disk. The apparatus includes a differentiation part for differentiating an output signal of a bandpass filter provided on an adjacent stage which eliminates a low DC component, a high frequency component and noise of an inputted modulation signal. A sample trigger generating circuit generates top and bottom signals in response to a data signal outputted through the differentiation part and a signal outputted through a comparator. A top hold part and a bottom hold part holds the data signal at top and bottom. A subtraction part performs a subtraction to obtain a difference between the top and bottom signals outputted from the top and bottom hold parts, thereby resulting in counting the number of the tracks traversed, while increasing a jumping speed required for a detection of the number of the tracks traversed.

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David F. Stout et al, Handbook of Operational Amplifier Circuit Design, McGraw-Hill Book Company.

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