高速数字存储示波器产品化设计的关键技术

论述了“100 MHz高速数字存储示波器”的关键技术，着重阐述了系统设计的概念和原理、基于低速器件的高速数据采集技术、基于随机取样技术的等效采样技术的实现。其中，随机等效采样的实现采用高分辨力测时扩展器，使等效采样率达到5 GSPS，时间测量分辨率达到200 ps，实现100 MHz(−3 dB)可重复信号的波形重现，并给出了实际应用中重建的波形图。The key techniques in the development of digital storage oscilloscope (DSO), a product type project taken by the authors, are discussed, of which the concept and the theory of the system design, the high-speed data acquisition technique based on the devices with lower operation speed, the equivalent sampling technique based on Random sampling are expatiated. The 200 ps time resolution and 5 GSPS equivalent sampling rate are gotten by using large-scale time expander, so the DSO can observe 100 MHz (−3 dB) seasonal signal. The results of experiment and application are presented in the end.