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Hardware and software implementation method for improving digital-analog/analog-digital conversion accuracy

An implementation method and technology of analog-to-digital conversion, applied in the direction of analog/digital conversion calibration/testing, etc., can solve the problems of high cost and poor digital-to-analog/analog-to-digital conversion accuracy, and achieve the effects of improving accuracy, correcting errors, and reducing costs

Inactive Publication Date: 2010-06-30
AVIC NO 631 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a software and hardware implementation method for improving the precision of digital-analog / analog-digital conversion, which solves the technical problems of high cost and poor precision of digital-analog / analog-digital conversion in the background technology

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  • Hardware and software implementation method for improving digital-analog/analog-digital conversion accuracy
  • Hardware and software implementation method for improving digital-analog/analog-digital conversion accuracy
  • Hardware and software implementation method for improving digital-analog/analog-digital conversion accuracy

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Embodiment Construction

[0034] The abbreviations used in the description of the embodiment of the present invention are expressed as:

[0035] A / D Analog to Digital Analog to Digital

[0036] D / A Digital to Analog

[0037] V REF Reference Voltage reference voltage

[0038] MUX Multiplex multiplexer

[0039] The ground signal in the GND Ground circuit, here refers to the common ground of various ground wires

[0040] A software and hardware implementation method for improving the precision of digital-to-analog / analog-to-digital conversion, which is special in that the software and hardware implementation method includes the following steps:

[0041] 1) Handling of errors caused by ground wires

[0042] The specific operation is to connect the various ground wires on the AD module and the DA module together;

[0043] 2) Generation of reference voltage

[0044] A reference voltage generation circuit is provided, which uses a voltage regulator tube and an operational amplifier to generate a refer...

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Abstract

The invention discloses a hardware and software implementation method for improving digital-analog / analog-digital conversion accuracy, which comprises the following four steps: (1) treatment on the error caused by earth wires; (2) reference voltage generation; (3) A / D protection circuit; and (4) software treatment. A reference voltage generating circuit of the invention can provide a high-precision reference voltage source, thereby reducing the cost for buying accurate voltage source; the software is used for processing the converted signals so as to further revise the errors generated in a hardware circuit and improve the accuracy; the invention carries out buffering and limiting processing on the acquired signals so as to limit the voltage accessing an A / D converter, and protect an A / D conversion chip. The invention provides a hardware and software implementation mechanism for effectively improving the digital-analog / analog-digital conversion accuracy.

Description

technical field [0001] The invention relates to a software and hardware implementation method, in particular to a software and hardware implementation method for improving digital-to-analog / analog-to-digital conversion precision. Background technique [0002] With the development of automatic control technology, it has become the most common practice to use digital computers to realize the acquisition and processing of analog signals. The parameters of the controlled object are usually reflected by the analog quantity, so the processing accuracy of the analog signal is directly related to the control accuracy. The conversion between analog and digital quantities (hereinafter referred to as digital-to-analog / analog-to-digital conversion) circuit is an indispensable part of the electronic system, and the conversion accuracy is an important technical indicator to measure the superiority of a conversion circuit. [0003] At present, the use of computer systems to process analog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/10
Inventor 刘海堂喻鸣毛宁
Owner AVIC NO 631 RES INST