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A Nonlinear Correction Method for Improving the Spurious-Free Dynamic Range of Analog-to-Digital Converters

An analog-to-digital, dynamic range technology, applied in the design and manufacture of electronic equipment, integrated circuit design and manufacture, can solve problems such as spurs, affecting the performance of analog-to-digital converters, distortion, etc., to suppress harmonics and improve spurious-free Effects of Dynamic Range, Nonlinear Distortion, and Spurious Rejection

Active Publication Date: 2021-01-22
SHEN YANG JIA LIAN ZHI CHENG TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that existing analog-to-digital converters will produce distortion and spurs that affect the performance of analog-to-digital converters, the present invention provides a non-linear correction method for improving the spurious-free dynamic range of analog-to-digital converters

Method used

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  • A Nonlinear Correction Method for Improving the Spurious-Free Dynamic Range of Analog-to-Digital Converters
  • A Nonlinear Correction Method for Improving the Spurious-Free Dynamic Range of Analog-to-Digital Converters
  • A Nonlinear Correction Method for Improving the Spurious-Free Dynamic Range of Analog-to-Digital Converters

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Embodiment 1

[0049] This embodiment proposes a nonlinear correction method and device for improving the spurious-free dynamic range of an analog-to-digital converter.

[0050] Such as figure 1 As shown, the nonlinear correction device of this embodiment includes a training signal generation module, a network parameter detection and extraction unit, an analog-to-digital converter, and a nonlinear correction processing unit.

[0051] The working principle of the non-linear correction method and device of the present embodiment is as follows:

[0052] In this embodiment, the correction of nonlinear distortion is realized by using the source equivalent network parameter data, specifically as follows: firstly, the network parameter detection and extraction unit obtains the training signal and extracts the source equivalent network parameter data of the training signal, and the source of the training signal The equivalent network parameter data is transmitted to the nonlinear correction process...

Embodiment 2

[0069] In this embodiment, the nonlinear correction method and device proposed in the above-mentioned embodiment 1 are used to correct the single-tone signal, the dual-tone signal and the actual analog input signal, and respectively obtain FFT frequency diagrams before and after correction.

[0070] Such as figure 2 As shown, the measured FFT spectrograms before and after the single-tone signal is corrected using the nonlinear correction method and device proposed in the above-mentioned embodiment 1 are shown by figure 2 It can be seen that the single-tone spurious-free dynamic range of the analog-to-digital converter is increased by 41 dB by using the nonlinear correction of the present invention.

[0071] Such as image 3 As shown, the measured FFT spectrograms before and after the two-tone signal is corrected by using the nonlinear correction method and device proposed in the above-mentioned embodiment 1 are shown by image 3 It can be known that the dual-tone spurious-...

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Abstract

The invention discloses a nonlinear correction method and device for improving the stray-free dynamic range of an analog-to-digital converter, including a training signal generation module, a network parameter detection and extraction unit, an analog-to-digital converter and a nonlinear correction processing unit. The present invention realizes the nonlinear correction of the analog-to-digital converter by setting the network parameter detection and extraction unit and the nonlinear correction processing unit, effectively suppressing the nonlinear distortion of the analog-to-digital converter such as harmonics, intermodulation, and high-order correlation spurs, At the same time, the non-linear distortion and spurs generated by quantization such as DNL and INL are also greatly suppressed, which significantly improves the spurious-free dynamic range of the analog-to-digital converter.

Description

technical field [0001] The invention relates to the fields of integrated circuit design and manufacture, electronic equipment design and manufacture, etc., in particular to a nonlinear correction method and device for improving the spurious-free dynamic range of an analog-to-digital converter (ADC). Background technique [0002] The existing analog-to-digital converter (ADC), the conditioning circuit will produce nonlinear distortion, and the process of comparison and quantization will also cause nonlinear distortion and INL, DNL and other distortions caused by uneven quantization, which will eventually lead to the converted digital quantization signal Harmonics, intermodulation, high-order correlated nonlinear distortion, spurs, etc. will be generated, making the spurious-free dynamic range index of the analog-to-digital converter a bottleneck and affecting the main key performance indicators of the analog-to-digital converter. Contents of the invention [0003] In order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/18
CPCH03M1/18
Inventor 胡梦辰
Owner SHEN YANG JIA LIAN ZHI CHENG TECH CO LTD
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