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Data read-out system and method for current reduction

A data readout and current reduction technology, which is applied in data recording, read/write signal modification, digital recording/reproduction, etc., can solve the problems of reducing the reading performance of the data reading system and reducing the performance of the analog front-end circuit. , to achieve the effect of reducing power consumption

Inactive Publication Date: 2010-06-16
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the signal quality is good enough, the reduction in the performance of the analog front-end circuit only slightly reduces the reading performance of the data reading system

Method used

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  • Data read-out system and method for current reduction
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  • Data read-out system and method for current reduction

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Embodiment Construction

[0022] In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the preferred embodiments are listed below, together with the accompanying drawings, and are described in detail as follows:

[0023] see figure 2 , figure 2 It is a schematic block diagram of a data readout system 200 that automatically reduces current consumption according to the present invention. The data readout system 200 reads data from a data storage device. In one embodiment, the data reading system 200 is an optical drive for retrieving data from an optical disc. The data readout system 200 includes an analog front-end circuit 204 , a digital signal processing system 206 and a switching signal generator 208 . PDIC 202 first retrieves the original data signal S from the optical disc 1 '. The analog front end circuit 204 then processes the raw data signal S 1 ’, and then convert the processed data signal from analog to digital to obtain a ...

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Abstract

The invention provides a method for current reduction for an analog circuit in a data read-out system. First, a performance indicator, indicating a performance of the data read-out system is generated. The performance indicator is then compared with a performance threshold level to generate a switch signal. A level of a current source biasing the analog circuit is then adjusted according to the switch signal. According to the data read-out system and the method for current reduction, the performance indicator is compared with the performance threshold level to generate a switch signal to adjust the current source biasing the analog circuit for reducing power consumption of the data read-out system but not reducing the effect of the performance of the data read-out system.

Description

technical field [0001] The present invention relates to data readout systems, and more particularly to data readout systems and methods for current reduction. Background technique [0002] A data readout system, such as an optical drive, includes an analog front-end circuit and a digital signal processing system. The analog front-end circuit retrieves raw data signals from the data storage device and processes the raw data signals to obtain analog data signals with better signal characteristics. After the analog data signal is converted to the digital data signal, the digital signal processing system can digitally process the digital data signal. [0003] see figure 1 , figure 1 It is a schematic block diagram of a data readout system 100 in the prior art. The data readout system 100 includes an analog front-end circuit 104 and a digital signal processing system 106 . Photo-Detector Integration Circuit (hereinafter referred to as PDIC) 102 first retrieves the original d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/18
CPCG11B20/18G11B20/10009G11B20/10481G11B20/10203G11B20/10212G11B20/10046G11B2220/2562G11B20/10037G11B20/10027
Inventor 谢秉谕涂维轩陈志权
Owner MEDIATEK INC