基于电流输出型D/A转换器的模拟量自激励电路  

Study of self-excitation circuit based on Current-Output D/A converter

作　　者：安书董 康晓东 李明 AN Shudong;KANG Xiaodong;LI Ming(Xi'an Aeronautics Computing Technique Research Institute,AVIC,Xi'an 710068,China)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,陕西西安710065

出　　处：《长江信息通信》2022年第3期111-114,共4页Changjiang Information & Communications

基　　金：航空科学基金项目资助(20101931004)。

摘　　要：文章提出一种飞机系统激励测试时的D/A转换电路,方案主要基于电流输出型D/A转换器进行模拟量激励输出,在介绍电流输出型D/A转换器后,主要通过供电电路、参考源、I-V转换、相位补偿四部分进行硬件设计,同时通过可编程逻辑器件控制转换器的时序,从而实现所需激励的输出。经验证,该方案只需改变参考源的形式,就可以实现具有高转换速率的激励信号,方案具有灵活性强、可移植性高等优点。This paper mainly introduce a self-excitation circuit based on Current-Output D/A converter.In this paper,the current-out converter AD7547 is introduced to achieve the high switching rate.The peripheral circuit mainly includes four aspects,were power-supply circuit,reference source,I-V converter and phase compensation.In order to obtain the precise voltage,the FPGA is used to control the timing sequence.The reference source can be regulated according to the different stimulation.The FPGA is used to generate the control timing,the VHDL is used to control the CS and WR based on finite-state machine.Different from others circuit,this scheme has higher switching rate and precision.

关 键 词：激励测试 电流输出型D/A转换器 I-V转换 高灵活性 

分 类 号：TN402[电子电信—微电子学与固体电子学]