现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
4期
112-114,117
,共4页
频率特性测试仪%DDS%FPGA%正弦信号测量
頻率特性測試儀%DDS%FPGA%正絃信號測量
빈솔특성측시의%DDS%FPGA%정현신호측량
frequency characteristic tester%DDS%FPGA%sinusoidal signal detection
针对传统频率特性测试仪价格昂贵、体积大、使用不方便等问题提出了基于DDS和FPGA的正弦信号频率特性测试仪。该测试仪由信号源模块、频率相位检测模块、数据处理与控制模块、显示模块4部分组成。该设计采用FPGA控制DDS芯片产生两路相互正交的信号，被测信号与之相乘，经滤波器后检测输出频率、幅度和相位，最后通过显示模块显示。实验结果证明，该频率特性测试仪设计正确可行，且硬件结构简单、体积小、重量轻，能广泛应用于正弦信号的测量，具有较高的应用价值。
針對傳統頻率特性測試儀價格昂貴、體積大、使用不方便等問題提齣瞭基于DDS和FPGA的正絃信號頻率特性測試儀。該測試儀由信號源模塊、頻率相位檢測模塊、數據處理與控製模塊、顯示模塊4部分組成。該設計採用FPGA控製DDS芯片產生兩路相互正交的信號，被測信號與之相乘，經濾波器後檢測輸齣頻率、幅度和相位，最後通過顯示模塊顯示。實驗結果證明，該頻率特性測試儀設計正確可行，且硬件結構簡單、體積小、重量輕，能廣汎應用于正絃信號的測量，具有較高的應用價值。
침대전통빈솔특성측시의개격앙귀、체적대、사용불방편등문제제출료기우DDS화FPGA적정현신호빈솔특성측시의。해측시의유신호원모괴、빈솔상위검측모괴、수거처리여공제모괴、현시모괴4부분조성。해설계채용FPGA공제DDS심편산생량로상호정교적신호，피측신호여지상승，경려파기후검측수출빈솔、폭도화상위，최후통과현시모괴현시。실험결과증명，해빈솔특성측시의설계정학가행，차경건결구간단、체적소、중량경，능엄범응용우정현신호적측량，구유교고적응용개치。
In view of the issues of the expensive price,big volume and inconvenient use of the traditional frequency charac-teristic tester,a sinusoidal signal frequency characteristic tester based on DDS and FPGA is proposed in this paper. The tester consists of a signal source module,frequency and phase detection module,data processing and control module,and display module. In the design of this tester,FPGA is used to control the chip DDS to generate two mutually orthogonal signals,which is multiplied with the measured signal for the detection of frequency,amplitude and phase of the measured signal through filter. The parameters of the signal are finally displayed by the display module. The experimental results show that the design of the fre-quency characteristic testing instrument is correct and feasible,has the advantages of simple hardware structure,small size and light weight,can be widely applied to the measurement of sinusoidal signals,and has high application value.
