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中文摘要：
针对信号发生芯片组成的信号发生器波形单一，幅值、频率等参量不便调节，且信号峰峰值不能满足磁通门的激励信号对峰峰值的要求的缺点，采用数字芯片CPLD为核心元件构建大信号幅值的正弦波和方波互换电路，以产生幅值、频率等参量可调的正弦波或方波信号。设计了基于CPLD的正弦波和方波转换电路，进行了CPLD相关功能模块的程序设计与实验测试，实验结果验证了转换电路的功能。
英文摘要：
To overcome the inconvenience of adjustment of the parameters of signal generator , such as waveform ,amplitude and frequency ,and to meet the requirements of fluxgate excitation on peak value ,CPLD was adopted as key components to generate large amplitude sine/square wave signal with adjustable amplitude ,frequency ,and other parameters .The sine/square wave conversion cir-cuits based on CPLD were designed ,and the corresponding functional module was programmed and tested .The experimental results verified the function of the conversion circuit .
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