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Analog-to-Digital Conversion System Based on Fwnn Prediction Network and Pipeline Structure

A predictive network, analog-to-digital conversion technology, applied in the direction of analog-to-digital converters, etc., can solve the problems of no chip products, limit the detection accuracy of FTS technology, etc., and achieve the effect of high-speed and high-precision analog-to-digital conversion

Active Publication Date: 2016-08-17
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the development level of analog-to-digital conversion chips, there is no single-chip ADC that can meet this demand, let alone chip products applied to aerospace-grade equipment, which limits the detection accuracy of FTS technology to a certain extent

Method used

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  • Analog-to-Digital Conversion System Based on Fwnn Prediction Network and Pipeline Structure
  • Analog-to-Digital Conversion System Based on Fwnn Prediction Network and Pipeline Structure
  • Analog-to-Digital Conversion System Based on Fwnn Prediction Network and Pipeline Structure

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Embodiment Construction

[0017] Such as figure 1 As shown, it is a functional block diagram of the analog-to-digital conversion system of the present invention, which mainly includes: a two-stage pipeline AD conversion structure, a FWNN prediction network module, a DA conversion link, a delay unit, a high-gain error amplifier and a data synthesis module.

[0018] The main process of digital-to-analog conversion is as follows: the input analog signal passes through the first-stage ADC to generate a digital signal D1 with M1 digits, and after the digital signal D1 passes through the FWNN prediction network module, a digital signal D2 with a predicted delay time T is generated , and the digital signal D2 generates an analog signal A3 at a predicted time delay T through an N-bit DAC. At this time, after a delay of T, the analog signal becomes A2, and the analog signal A2 and the analog signal A3 are sent to a high-gain error amplifier with a gain of G to obtain the amplified error analog signal Diff_A, w...

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Abstract

The invention relates to an FWNN (fuzzy wavelet neural network) based analog-digital conversion system of a pipeline structure. The system comprises an FWNN module, a data synthesis module, two high-speed low-bit AD (analog to digital) chip, a differential amplifier and a DA (digital to analog) chip. The two AD chips form a pipeline, an input analog signal is inputted to the FWNN module after being subjected to first-stage AD conversion to obtain data approaching to the input analog signal at a certain moment after that time, the data are subjected to DA conversion to obtain an analog signal, a difference between the analog signal and the input analog signal is subjected to high-gain amplification prior to secondary AD conversion, and the data subjected to twice AD conversion are processed by the data synthesis module to obtain high-accuracy AD conversion data corresponding to the input analog signal. The high-speed high-accuracy AD conversion system is realized through the two high-speed low-bit AD chips, and can be applied to analog signal conversion with requirements on high speed, high accuracy, large dynamic range and high signal to noise ratio.

Description

technical field [0001] The invention relates to an analog-to-digital conversion system, which can be used for the acquisition of analog signals with high speed, large dynamic range and high signal-to-noise ratio. Background technique [0002] Fourier Transform Spectroscopy (FTS) technology is a spectral analysis technology with Michelson interferometer as the core. The characteristic of the interference signal is that the signal near zero optical path difference is very strong, and the signal near the maximum optical path difference is very weak. The amplitude difference can reach more than 100dB. [0003] The FTS-based detection technology first converts the interference light into a weak current signal through the photoelectric conversion link, and then performs signal conditioning. The amplification circuit includes a preamplifier, a main amplifier and a low-pass filter circuit, and has an adjustable gain function, mainly to amplify the electrical signal output by the de...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 刘正敏张玉贵李辉彭妮娜汪洲王旭李强韩志学王衍曹伟
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH