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Analog-digital converter,analog-digital conversion system, data reading system and its related method

An analog-to-digital converter and data reading technology, applied in analog-to-digital conversion, data recording, code conversion, etc., can solve the problem of the large area occupied by the comparator, and achieve the effect of high accuracy and low cost

Active Publication Date: 2011-09-07
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above-mentioned problem that the comparator occupies a large area in the data reading system with high accuracy and high speed, the present invention provides a data reading system and a data reading method with non-linear analog-to-digital conversion resolution, The intervals carrying most of the information in the analog input signal are quantized at a higher resolution, while the intervals carrying less information are quantized at a lower resolution to reduce the number of comparators in the data readout system and simultaneously maintain accuracy

Method used

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  • Analog-digital converter,analog-digital conversion system, data reading system and its related method
  • Analog-digital converter,analog-digital conversion system, data reading system and its related method
  • Analog-digital converter,analog-digital conversion system, data reading system and its related method

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[0019] Certain terms are used in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers 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 criterion for distinguishing. The "comprising" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0020] Please also refer to figure 1 as well as figure 2 , fig...

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Abstract

A data readout system with non-uniform resolution has a pick up head for reading data stored in an optical disc and generating an analog signal, a reference voltage unit for producing a plurality of reference voltage levels, wherein voltage differences between two adjacent reference voltage levels are not all the same, a plurality of comparators for comparing the reference voltage levels with theanalog signal and generating comparison results, and an encoder for encoding the comparison results into a digital signal.

Description

technical field [0001] The present invention relates to an analog-to-digital converter, in particular to an analog-to-digital converter used in a data readout system. Background technique [0002] Because it is often necessary to convert a large amount of information from analog signals to digital signals, high-speed analog-to-digital converters occupy a very important place in today's circuit design, such as flash analog-to-digital converters (flash analog-to-digital converter) It is often used to quickly convert analog signals to digital signals. The flash analog-to-digital converter utilizes parallel operation to achieve high-speed conversion. General n-bit flash analog-to-digital converters need to use 2 n -1 comparator to generate the comparison result, and then encode the comparison result into n-bit digital output. However, the chip area occupied by the comparator is huge, and when the required resolution is higher, the required chip area is larger. For a data rea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/36G11B7/005
CPCH03M1/362H03M1/1295H03M1/183H03M1/367
Inventor 康宗弘
Owner MEDIATEK INC