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Precision adjusting method based on digital compensation and digital oscilloscope

An adjustment method and digital waveform technology, applied in digital variable display, digital variable/waveform display, instruments, etc., can solve problems such as channel offset and waveform offset display change discontinuously, achieve continuous values ​​and avoid loss of intermediate values Effect

Active Publication Date: 2019-11-08
SHENZHEN CITY SIGLENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is how to improve the DC gain accuracy and DC offset accuracy of the existing digital oscilloscope, and how to solve the problem of discontinuous changes in channel offset adjustment and waveform offset display under small voltage gears

Method used

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  • Precision adjusting method based on digital compensation and digital oscilloscope
  • Precision adjusting method based on digital compensation and digital oscilloscope
  • Precision adjusting method based on digital compensation and digital oscilloscope

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Embodiment 1

[0028] Please refer to figure 1 , the present application provides an accuracy adjustment method based on digital compensation, the accuracy adjustment method mainly includes steps S100-S500, which will be described respectively below.

[0029] Step S100, acquiring digital waveform data of the signal.

[0030] In this embodiment, the digital waveform data of the signal can be obtained by sampling the analog signal, for example, the analog-to-digital conversion is performed on the signal by means of an analog-to-digital conversion device (ADC) to obtain the digital waveform data.

[0031] In step S200, random number compensation is performed on the value of each data point in the digital waveform data to obtain a plurality of compensation values ​​corresponding to the value of the data point. In a specific example, see figure 2 , the step S200 may include steps S210-S220, which are respectively described as follows.

[0032] Step S210 , according to the preset number of ext...

Embodiment 2

[0069] Please refer to Figure 5 The present application provides a digital oscilloscope 1, which mainly includes an attenuation network 11, an adjustable gain amplifier 12, an analog-to-digital converter 13, a controller 14 and a display 15, which will be described separately below.

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Abstract

The invention discloses a precision adjusting method based on digital compensation and a digital oscilloscope. The method comprises the steps of obtaining digital waveform data of a signal; performingrandom number compensation on a numerical value of each data point in the digital waveform data to obtain a plurality of compensation values corresponding to the numerical values of the data points;performing digital gain configuration on each compensation value to obtain a plurality of one-to-one corresponding configuration values; cutting out each configuration value, and obtaining first values with the isotopic number as the numerical values of the data points; according to the first values, displaying the signal waveforms. Due to the fact that the obtained first values show the distribution with continuous values and the small identical numerical value ratio, no middle numerical value is lost, when the first values are used for performing waveform displaying, the waveforms can show the smooth display effect with no broken line, and the signal waveform observation experience of technicists can be improved.

Description

technical field [0001] The invention relates to the technical field of oscilloscopes, in particular to a precision adjustment method based on digital compensation and a digital oscilloscope. Background technique [0002] Due to the development of semiconductor technology, the noise floor of operational amplifiers is getting better and better, and the power supply ripple is getting lower and lower, which makes the application scenarios of oscilloscopes more and more. From measuring the noise floor of operational amplifiers to measuring switching power supplies, oscilloscopes need to be used. The voltage range is also getting wider and wider, the range supports from as low as hundreds of uV to as high as tens of V, and the range of bias voltage that can be adjusted is dozens of times or more than the voltage range of each level. wider scope. The adjustment of bias voltage is generally realized by DAC (Digital-to-Analog Converter), which not only needs to adapt to the range as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R13/02
CPCG01R13/029
Inventor 周旭鑫刘仲胜郑文明
Owner SHENZHEN CITY SIGLENT TECH
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