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Method for Adaptively Adjusting Coding Mode and Its Digital Correction Circuit

A technology for adjusting coding and digital correction, which is applied in code conversion, electrical components, analog/digital conversion, etc., can solve problems such as incorrect output results, variation differences of continuous approximation analog-to-digital converters, etc., and achieve the effect of improving abnormal changes

Active Publication Date: 2020-07-10
REALTEK SEMICON CORP
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Problems solved by technology

[0004] However, under different process voltage temperature (PVT) offsets, the conversion time of the continuous approximation analog-to-digital converter may produce some variation differences.
For example, when the process voltage temperature drift causes its conversion time to be shortened, it may make the continuous approximation analog-to-digital converter unable to successfully complete the last required comparison cycle within a given time (that is, The number of comparison cycles actually completed is less than a certain expected number), so it will jointly lead to incorrect output results

Method used

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  • Method for Adaptively Adjusting Coding Mode and Its Digital Correction Circuit
  • Method for Adaptively Adjusting Coding Mode and Its Digital Correction Circuit
  • Method for Adaptively Adjusting Coding Mode and Its Digital Correction Circuit

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Embodiment Construction

[0016] Hereinafter, the present invention will be described in detail by illustrating various embodiments of the invention by way of drawings. Inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Additionally, the same reference numbers may be used to denote similar components in the drawings.

[0017] The method for adaptively adjusting the encoding method and the digital correction circuit provided by the embodiments of the present invention can be applied to any continuous approximation analog-to-digital converter (SAR ADC). In a word, the present invention does not limit the specific implementation of the continuous approximation analog-to-digital converter.

[0018] For example, see figure 1 , figure 1 is a schematic diagram of a continuous approximation analog-to-digital converter provided by an embodiment of the present invention. The continuous approximation analog...

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Abstract

The invention discloses a method for adaptively adjusting an encoding mode, and a digital correction circuit thereof. The method is applicable to a continuous approximation type analog-to-digital converter, and can decide whether to adjust binary weight corresponding to each digit bit according to a known number of finished comparison cycles at first, so as to carry out encoding and integration to generate a first encoding sequence; and then, the first encoding sequence is subjected to compensation associated with an unfinished comparison cycle directly, so as to generate correct digit output codes.

Description

technical field [0001] The present invention relates to a method for adaptively adjusting a coding method and a digital correction circuit thereof, and is particularly applicable to an adaptive method for a continuous approximation analog-to-digital converter (successive-approximation-register ADC, SAR ADC) A method for adjusting encoding mode and a digital correction circuit thereof. Background technique [0002] An analog-to-digital converter (ADC) has various types of architectures, such as flash, pipelined, or sequential approximation (SAR). Each of these architectures has its own advantages and disadvantages, and is usually selected based on different application requirements. Among them, SAR ADCs with lower power consumption, smaller area and lower cost are most widely used in recent years. [0003] Traditionally, the continuous approximation analog-to-digital converter uses a binary search algorithm (binary search algorithm) to obtain a digital output code that matc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/06H03M1/38
Inventor 林圣雄黄诗雄
Owner REALTEK SEMICON CORP
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