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Analog-digital conversion circuit

An analog-to-digital conversion circuit and analog-to-digital conversion technology, which can be used in analog/digital conversion, code conversion, electrical components, etc., and can solve problems such as insufficient energy efficiency, simple structure, and high cost.

Pending Publication Date: 2021-02-09
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technical solutions either have a complex structure and high cost, or a simple structure but insufficient energy efficiency, which affects the effect of analog-to-digital conversion

Method used

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Embodiment Construction

[0073] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0074] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0075] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, componen...

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Abstract

The invention relates to an analog-to-digital conversion circuit, which comprises N sampling and conversion modules connected in parallel which are used for simultaneously sampling and sequentially converting first analog signals of N channels and outputting second analog signals, wherein each sampling and conversion module comprises a plurality of sampling capacitors connected in parallel, and Nis an integer greater than 1; a comparison module which is connected to the N sampling and conversion modules and used for comparing the second analog signals to obtain comparison signals; and a control module which is connected to the N sampling and converting modules and the comparison module, and is used for controlling the N sampling and converting modules and outputting converted digital signals according to the comparison signals. According to the analog-to-digital conversion circuit disclosed by the invention, while a multi-channel synchronous sampling function is realized, a successiveapproximation conversion function can be directly completed on the sampling capacitor, and the charge loss of the sampling and conversion module can be reduced, so that the energy efficiency of the analog-to-digital conversion circuit is improved with relatively low circuit cost.

Description

technical field [0001] The present disclosure relates to the technical field of integrated circuits, in particular to an analog-to-digital conversion circuit. Background technique [0002] Analog-to-Digital Converter (Analog-to-Digital Converter, ADC) is a key component of the interface between the analog system and the digital system, which can realize the conversion from analog signal to digital signal. The successive approximation (Successive Approximation Register, SAR) analog-to-digital converter is a high-speed and high-precision ADC structure, which is widely used in the Internet of Things, wearable devices, implantable medical electronics and other fields. [0003] A successive approximation analog-to-digital converter (SAR ADC) includes a sample-and-hold circuit, a digital-to-analog converter (Digital-to-Analog Converter, DAC), a comparator (Comparator, COMP), and a successive-approximation logic circuit. The SAR ADC uses a binary search algorithm to reach the fina...

Claims

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Application Information

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IPC IPC(8): H03M1/46
CPCH03M1/46H03M1/123H03M1/468H03M1/1245H03M1/466
Inventor 孙楠仲易刘佳欣
Owner TSINGHUA UNIV
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