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Analog-to-digital converter

An analog-to-digital converter and digital-to-analog conversion technology, which is applied in the field of signal processing, can solve the problems of large power consumption of ΔΣADC, achieve low power consumption, reduce feedback DAC nonlinearity, and relax bandwidth and gain requirements

Inactive Publication Date: 2019-04-02
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the power consumption of ΔΣADC is relatively large, and there is an urgent need for an ADC that can meet the requirements of high precision and low power consumption at the same time.

Method used

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Embodiment Construction

[0023] The invention discloses an analog-to-digital converter, and those skilled in the art can learn from the content of this article and appropriately improve the process parameters to realize it. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and the relevant personnel can obviously make changes or appropriate changes and combinations to the method and application described herein without departing from the content, spirit and scope of the present invention to realize and Apply the technology of the present invention.

[0024] Firstly, the inventor of the present application studies the process of obtaining the analog-to-digital converter provided by the present invention for description:

[0025] Model a two-order ideal co...

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Abstract

An embodiment of the invention provides an analog-to-digital converter. According to the analog-to-digital converter, a first output end of a multi-bit quantizer is connected with a second input end of a third integrator by means of a first delay circuit and a second digital-to-analog conversion unit sequentially, so as to form a first negative feedback circuit; and a second output end of the first multi-bit quantizer is connected with a second input end of a first integrator by means of a nonlinear dynamic element matching logical device and the first digital-to-analog conversion unit sequentially, so as to form a second negative feedback circuit. The analog-to-digital converter can feed back a quantization result of the quantizer to the inputs of the integrators in a segmented manner, and realizes second-order noise shaping through feeding back the least significant bit segment to the input of the digital-to-analog converter. The analog-to-digital converter can significantly reduce the output swing of the integrators and greatly relax the bandwidth and gain requirements of operational amplifier design. The analog-to-digital converter provided by the embodiment of the invention can meet the requirements of high precision and low power consumption at the same time.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to an analog-to-digital converter. Background technique [0002] Analog-to-Digital Converter (ADC) is an electronic device that converts analog signals into digital signals. ΔΣ (also known as Delta-Sigma) ADC adopts a strategy of exchanging speed for precision, combined with oversampling And noise shaping technology, which greatly reduces the noise energy in the band, so it has high precision, and can achieve high resolution without strict matching or correction even at low voltage. [0003] However, the ΔΣ ADC consumes a lot of power, and there is an urgent need for an ADC that can simultaneously meet the requirements of high precision and low power consumption. Contents of the invention [0004] In view of this, the present invention provides an analog-to-digital converter to simultaneously meet the requirements of high precision and low power consumption. [0005] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/358
Inventor 严海月邓建飞曾铭王宇涛林福江
Owner UNIV OF SCI & TECH OF CHINA
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