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Digital-to-analog converter and control method thereof

A digital-to-analog and digital-to-analog conversion technology, applied in digital-to-analog converters, analog/digital conversion, analog/digital conversion calibration/testing, etc., can solve problems affecting DAC output precision and accuracy, and achieve long-term drift suppression , Improve the effect of accuracy and precision

Active Publication Date: 2019-02-22
HEFEI ORIGIN QUANTUM COMP TECH CO LTD
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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a digital-to-analog converter and its control method, which can suppress the long-term drift and solve the problem in the prior art that the long-term drift affects the output precision and accuracy of the DAC

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  • Digital-to-analog converter and control method thereof
  • Digital-to-analog converter and control method thereof
  • Digital-to-analog converter and control method thereof

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Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the solutions of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only It is a part of the embodiments of this application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

[0044] At present, there is a method to suppress long-term drift is to select low-drift devices when selecting components in the DAC, that is, in the DAC link, including DAC, buffer, reference, resistance on the link, etc. Low drift device. In this way, the low drift characteristics of each device are used to ensure the low drift of the DAC output and realize the suppression of long...

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Abstract

The invention discloses a digital-to-analog converter and a control method thereof. The digital-to-analog converter comprises a control unit, an analog-to-digital conversion unit and at least one digital-to-analog conversion unit; the control unit is used for outputting a digital control signal to the digital-to-analog conversion unit according to a received control instruction; the digital-to-analog conversion unit for converting a digital control signal into an analog output signal to output; the analog-to-digital conversion unit is used for converting the analog output signal into a digitaldetection signal, and outputting the digital detection signal to the control unit; the control unit is further used for adjusting the digital control signal according to the digital detection signaloutput by the analog-to-digital conversion unit, thereby enabling the signal output by the digital-to-analog conversion unit to meet an expected value indicated by the control instruction. The rejection on the long drift can be realized, and the accuracy and the precision of the output are improved.

Description

Technical field [0001] This application relates to the field of power electronics technology, in particular to a digital-to-analog converter and its control method. Background technique [0002] With the development of high-precision circuit systems, the accuracy requirements of the digital to analog converter (DAC) output step are getting higher and higher. In order to achieve high-precision stepping, the error source on the DAC needs to be controlled to a small extent. [0003] One type of error source is drift, including temperature drift and long-term drift. Long-term drift refers to the change of device parameters with the increase of time, which in turn manifests as the change of the output of the DAC with the increase of time. Long-term drift will cause the output accuracy of the digital-analog converter to be low and the output accuracy does not meet the system requirements. Summary of the invention [0004] In view of this, the embodiments of the present application prov...

Claims

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Application Information

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IPC IPC(8): H03M1/10H03M1/66
CPCH03M1/1014H03M1/66
Inventor 孔伟成赵勇杰杨夏
Owner HEFEI ORIGIN QUANTUM COMP TECH CO LTD
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