| 基于PWM的电流输出数模转换电路 |
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| 引用本文： | 袁梅,田宏达,董韶鹏,陈松方. 基于PWM的电流输出数模转换电路[J]. 仪表技术与传感器, 2011, 0(7) |
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| 作者姓名： | 袁梅 田宏达 董韶鹏 陈松方 |
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| 作者单位： | 北京航空航天大学自动化科学与电气工程学院,北京,100191 |
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| 摘 要： | 介绍了基于微控制器的PWM实现D/A转换的原理,在此基础上提出了以4～20 mA电流形式输出的数模转换电路的设计方案,并对转换电路的实现进行详细的理论分析.电路仿真及实际测试数据分析表明,提出的设计方案具有廉价、精度及分辨率高的特点,非常适合应用于自动化仪表中对D/A精度、分辨率、成本要求较高的开发过程.
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| 关 键 词： | 电路设计 PWM 4～20 mA电流 数模转换 |
Design of Digital-to-analog Circuit Based on PWM |
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| YUAN Mei,TIAN Hong-da,DONG Shao-peng,CHEN Song-fang. Design of Digital-to-analog Circuit Based on PWM[J]. Instrument Technique and Sensor, 2011, 0(7) |
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| Authors: | YUAN Mei TIAN Hong-da DONG Shao-peng CHEN Song-fang |
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| Affiliation: | YUAN Mei,TIAN Hong-da,DONG Shao-peng,CHEN Song-fang(School of Automation Science and Electrical Engineering,BEIHANG University,Beijing 100191,China) |
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| Abstract: | This paper described the principle of D/A converter,transformed from the microcontroller's PWM.On this basis,the paper proposed the circuit design of D/A converter whose output from 4 mA to 20 mA current,and made a detailed theoretical analysis of the circuit design.The simulation and actual test data of the circuit design show that this circuit design has features of low-cost,high precision and resolution. |
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| Keywords: | circuit design PWM 4~20 mA current D/A converter |
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