Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method for generating adaptive tracking zero cross signal in CD driver

An optical disc drive, self-adaptive technology, applied in the recording of information on the magnetic disk, recording/reproducing by optical methods, transducing head device, etc., can solve the problems of inaccurate information of position and speed, malfunction and so on

Inactive Publication Date: 2003-04-16
SAMSUNG ELECTRONICS CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the information about the position and velocity is imprecise, which can lead to malfunctions in the search servo

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus and method for generating adaptive tracking zero cross signal in CD driver
  • Apparatus and method for generating adaptive tracking zero cross signal in CD driver
  • Apparatus and method for generating adaptive tracking zero cross signal in CD driver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Such as figure 2 As shown, according to the first embodiment of the present invention, the device for generating an adaptive tracking zero-cross signal in an optical disc drive includes: an adder 201, a comparator 202, a digital-to-analog (D / A) converter (DAC ) 203, a counting unit 204, an arithmetic unit 205, a correction signal generator 206, and a noise suppression filter 207.

[0019] An adder 201 , a comparator 202 and a D / A converter 203 form an analog signal processor 1000 , and a counting unit 204 , an arithmetic unit 205 , a correction signal generator 206 and a noise suppression filter 207 form a digital signal processor 2000 .

[0020] A circuit including the counting unit 204, the arithmetic unit 205, the correction signal generator 206 and the D / A converter 203 is called an offset correction arithmetic unit.

[0021] The comparator 202 can be constituted by an operational amplifier, etc., and receives a reference voltage V as an input signal REF to the i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A device and a method for servo controlling device in a disk driver, more specifically, an apparatus for generating an adaptive track zero crossing signal in a disc drive are provided to correct the offset and balance by duty correction , even if a tracking signal of a disk drive is offset or unbalanced, for generating a precise track zero crossing signal, thereby precisely carrying out the seek servo control by precise velocity and position information obtained from the track zero crossing signal. In addition, the invnetion relates to the methods used in the apparatus.

Description

technical field [0001] The present invention relates to an optical disc drive (disk drive) servo control apparatus and a method for the same, and more particularly, to an apparatus which, although the tracking error signal of the optical disc drive is offset and unbalanced Under the circumstances, it is used to generate an accurate adaptive trace zero crossing signal (adaptive trace zero crossing signal) in an optical disc drive by correcting the offset and imbalance due to duty correction (duty correction), and the present invention also relates to A method for the device. Background technique [0002] Typically, the tracking zero-crossing signal is used to estimate the transport velocity and position information of a sensor included on an optical disc drive pickup. Thus, if the tracking zero-crossing signal is unstable, the velocity and position of the sensor cannot be accurately estimated. As a result, precise search control cannot be performed. [0003] A typical trac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B19/02G11B7/085G11B7/09G11B21/08G11B21/10
CPCG11B21/083G11B7/08541G11B19/02
Inventor 尹亨德
Owner SAMSUNG ELECTRONICS CO LTD