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Improving the frequency resolution of spectrum analyzer based on DDS technology

  • 2013-09-19
  • 172.31KB
  • Points it Requires : 2

将新器件应用于传统仪器是改善其性能的重要手段之一。本设计采用DDS 芯片产生数字扫频本振信号,集成模拟乘法器实现外差式混频,晶体滤波器完成中频滤波,集成化真有效值转换芯片完成频谱分量的有效值转换,设计了超外差中频滤波式频谱分析仪,工作频率范围为10Hz ~20kHz ,其显著特点是频率分辨率高。关键词:频谱分析仪;频率分辨率;DDS ;晶体滤波器;

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