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Analog-digital converter and method thereof

An analog-to-digital conversion and analog-to-digital technology, applied in the field of continuous progressive registers, can solve the problems of limiting SARADC conversion speed, difficulty in achieving high resolution and high conversion speed, and long time

Active Publication Date: 2015-04-15
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, more steps are required to update the digital code during continuous approximation, that is, it takes a long time to complete continuous approximation, thus limiting the conversion speed of SAR ADC
In short, it is difficult for the existing technology to achieve both high resolution and high conversion speed

Method used

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  • Analog-digital converter and method thereof
  • Analog-digital converter and method thereof
  • Analog-digital converter and method thereof

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Embodiment Construction

[0066] The following detailed description refers to the accompanying drawings, and discloses various practicable embodiments of the present invention by way of illustration. The described embodiments are specific and sufficiently disclosed to enable one of ordinary skill in the art to perform them. Different embodiments are not mutually exclusive, some embodiments can be combined with one or more embodiments to form new embodiments. Therefore, the following detailed description is not intended to limit the invention.

[0067] figure 1 is a functional block diagram of an analog-to-digital conversion device according to an embodiment of the present invention. refer to figure 1 , the analog-to-digital conversion device 100 includes a main digital-to-digital converter (analog-to-digital converters; ADC) 110 and an auxiliary ADC 120 .

[0068] The main ADC 110 receives an analog input signal V IN and output the main digital data D OUT . Auxiliary ADC120 receives the same ana...

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Abstract

The disclosure provides an analog-digital converter and a method thereof. The analog-digital converter comprises a main analog-digital converter and an auxiliary analog-digital converter. The main analog-digital converter is used for converting an analog input signal into main digital data, and the auxiliary analog-digital converter is used for converting the same analog input signal into auxiliary digital data. The main analog-digital converter has a first resolution and a first conversion speed, and the auxiliary analog-digital converter has a second resolution and a second conversion speed, wherein the second resolution is lower than the first resolution, and the second conversion speed is faster than the first conversion speed. The main analog-digital converter generates the main digital data by executing a continuous progressive program which comprises a fast tracking step based on the auxiliary digital data.

Description

technical field [0001] The present invention relates to a successive-approximation-register (SAR) analog-to-digital converter (analog-to-digital converters; ADC), in particular to an analog-to-digital conversion device and method thereof. Background technique [0002] SAR ADCs have been widely used in many applications. SAR ADC converts analog input signal into digital output data. The SAR ADC has a SAR controller and a digital-to-analog converter (DAC). The SAR controller is used for the continuous approximation, while the DAC is used to convert the digital code into a voltage. In order to make SAR ADC have high-resolution conversion, usually need to use high-resolution DAC. In this way, more steps are required to update the digital code during continuous approximation, that is, it takes a longer time to complete the continuous approximation, thus limiting the conversion speed of the SAR ADC. In short, it is difficult for existing technologies to achieve both high resol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12
Inventor 林嘉亮
Owner REALTEK SEMICON CORP