提升宽带高速ADC的SFDR性能的关键技术  

Key Technology to Improve SFDR Performance of Broadband High Speed ADC

作　　者：张帆[1] Zhang Fan(Southwest China Electronic Technology Institute,Sichuan Chendu 610036)

机构地区：[1]中国西南电子技术研究所

出　　处：《电子质量》2019年第12期43-49,共7页Electronics Quality

基　　金：装备发展部基金项目(61405180506)

摘　　要：深空测控通信中需在大带宽内对多个目标信号同时进行无误码解调,且极端应用场景中大信号与极微弱信号同时存在。要实现多目标强弱信号全频谱同时采集,要求模拟数字转换器(Analog to Digital Converter,ADC)的无杂散动态范围(Spurious Free Dynamic Range,SFDR)性能尽可能的高。提升SFDR性能需要从系统各个层面进行优化设计,采取关键技术手段,才可达到预期的结果。该文分析了影响ADC的SFDR性能各个因素,并采取频谱规划设计、功率规划设计、电源优化设计、时钟电路优化设计、差分驱动电路优化等综合设计手段,从而实现最佳采样。In deep space tt&c communication,it is necessary to demodulate multiple target signals without error in large bandwidth at the same time.The SFDR performance of ADC is required to be as high as possible to achieve the simultaneous acquisition of multi-target strong and weak signals in the full spectrum.To improve SFDR need to optimize the design from all aspects of the system and adopt key technical means to achieve the expected results.In this paper,various factors influencing SFDR of ADC are analyzed,and spectrum planning design,power planning design,power supply optimization design,clock circuit optimization design,differential drive circuit optimization and other comprehensive design means are adopted to achieve the best sampling.

关 键 词：ADC SFDR 频谱规划 优化 

分 类 号：TN792[电子电信—电路与系统]