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Methods and devices for detecting wobbles on an optical disc

A technology for optical discs and signal detection, applied in optical recording/reproduction, optical discs, optical recording/reproduction/erasing methods, etc., can solve the problems of enveloping detectors and integrators occupying the chip area, and improve quality , reduced chip area, high performance

Inactive Publication Date: 2011-04-20
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some of the aforementioned analog AGC circuits, the envelope detector and integrator occupy a large chip area because they need to operate in a low frequency environment

Method used

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  • Methods and devices for detecting wobbles on an optical disc
  • Methods and devices for detecting wobbles on an optical disc
  • Methods and devices for detecting wobbles on an optical disc

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Embodiment Construction

[0020] Certain terms are used throughout the description and claims to refer to particular components. Those skilled in the art should understand that a manufacturer may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a distinguishing criterion. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. The present invention is illustrated by the description of the following preferred embodiments and with the full text of Figures 1 to 12, but the devices, components, methods, and steps in the following description are used to explain the present invention, and should not be used to limit the present invention .

[0021] FIG. 1 is a schemat...

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Abstract

A device for detecting wobbles on an optical disc is provided, where the device is utilized for generating a wobble signal according to a plurality of detection signals. The device includes an analog signal processing circuit, a pair of analog-to-digital converters (ADCs), and a digital signal processing circuit. The analog signal processing circuit is arranged to perform analog signal processingon the detection signals to generate a plurality of output signals. In addition, the pair of ADCs are arranged to digitalize the output signals to generate a plurality of digital values. Additionally, the digital signal processing circuit is arranged to perform digital signal processing on the digital values and generate an arithmetic output, where the arithmetic output is utilized for generatingthe wobble signal or utilized as the wobble signal. An associated method for detecting wobbles on an optical disc is further provided.

Description

technical field [0001] The present invention relates to wobble detection of optical storage devices, and in particular, to a method and apparatus for detecting wobble of an optical disc. Background technique [0002] A traditional swing detection circuit includes many large-sized components, such as an analog automatic gain control (Automatic Gain Control, AGC) circuit and an analog filter, wherein the analog filter is, for example, an analog low-pass filter (Low Pass Filter, LPF) and an analog Band Pass Filter (BPF). According to the related art, implementing a conventional wobble detection circuit requires a large chip area because the multiple analog components operate at low frequencies. In some of the aforementioned analog AGC circuits, the envelope detector and the integrator occupy a large chip area because they need to operate in a low frequency environment. [0003] In application, when implementing separate voltage gain amplifiers (Voltage Gain Amplifiers, VGAs) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/095
CPCG11B2020/1268G11B20/10027G11B20/10046G11B2220/2537G11B2020/1274G11B20/10009G11B7/0053G11B2020/1239
Inventor 林子杰郑裕陈志清刘赐斌林郁轩
Owner MEDIATEK INC