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A method and corresponding system for reducing ground plane signal noise at ADC sampling time

A technology of signal noise and sampling time, applied in the direction of analog-to-digital converters, etc., can solve the problems of increasing the complexity of the circuit structure, and achieve the effect of simple implementation, strong practicability, and improved sampling accuracy

Active Publication Date: 2015-10-14
NARI TECH CO LTD
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  • Application Information

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Problems solved by technology

However, these existing technical methods cannot effectively reduce the influence of digital circuit ground plane signals on sampling, and increase the complexity of the circuit structure

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  • A method and corresponding system for reducing ground plane signal noise at ADC sampling time
  • A method and corresponding system for reducing ground plane signal noise at ADC sampling time

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings .

[0023] figure 1 It is a schematic diagram of the module structure of the sampling system of the embodiment of the present invention. This figure shows the ADC sampling system obtained by the present invention by improving a typical sampling module system. Among them, the analog signal conditioning circuit 1 receives the original analog signal and performs preprocessing such as isolation, filtering, shaping, scaling, etc., so as to make it more suitable for the input requirements of the analog-to-digital converter (ADC) 2 . The analog-to-digital converter 2 performs the conversion from the analog signal to th...

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Abstract

The invention provides a method and a corresponding system for denoising horizon signals during sampling time of an ADC. When synchronous sampling control signals of voltage currents are valid, and an ADC of a sampling system performs conversion and controls operating modes of digital circuits in the sampling system to be converted into a pause or idle state; and when the sampling system completes the conversion, operating modes of digital circuits in the sampling system are restored to a normal state. According to the method and the corresponding system for denoising horizon signals during sampling time of the ADC, noises at the horizon can be accurately reduced during the sampling time of the ADC, and accordingly, the sampling accuracy is improved; the scheme is simple to achieve, and no extra hardware circuit is needed to be added; and the practicality is high, and the method and the corresponding system can be applied to various ADC sampling occasions.

Description

technical field [0001] The present invention relates to the field of industrial measurement and control, and more specifically, relates to a method and system for reducing ground plane signal noise at ADC sampling time applied in the analog quantity sampling process of power system protection measurement and control equipment. Background technique [0002] Power system protection measurement and control equipment is an automatic device that quickly and accurately trips the circuit breaker or sends a signal when the electrical components in the power system fail or operate abnormally. Signals such as voltage, current, temperature, and switching value of electrical components are the main parameters for judging their working status. After sampling and calculating these signals, the protection measurement and control equipment can judge the status of electrical components in real time according to the calculation results, and give corresponding control behaviors according to th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
Inventor 周华良夏雨郑玉平姜雷汪世平
Owner NARI TECH CO LTD