| Digital Phosphor Oscilloscopes has waveform storage, analysis, printing and other advantages of traditional digital storage oscilloscopes, and it digitally simulate the fluorescent effect of CRT (Cathode Ray Tube) monitors, which display the brightness level of the waveform that reveal the frequency of measured signal and show the key information of signal. Being high price it occupied the high-end market. For this reason, It meet market needs to develop the cost-effective Digital Oscilloscopes with fast waveform capture rate and fluorescent waveforms .This paper proposed a target of high-speed oscilloscope waveform capture technology. The subject come from the development of portable 10MHz low-bandwidth digital phosphor oscilloscopes. It used Cyclone(?)Ⅲfamily FPGA devices and the QuartusⅡsoftware to achieve high-speed oscilloscope waveform capture technology, Using hardware architecture rapidly captured wavedate and reconstructed three-dimensional waveform.The paper consists of six chapters. The chapterⅠbriefly described the situation and development trend of the oscilloscope; The chapterⅡdiscussed the plan of high-speed waveform capture technology of digital phosphor oscilloscope; The method of high-speed waveform capture technology is described from chapterⅢto chapterⅤ. The chapterⅢdiscussed the waveform memory system, describing in detail the structure and implementation methods of Oscilloscope storage system; The chapterⅣdiscussed the single waveform capture process, describing design process used ADC converted data to reform the two-dimensional waveform, and then superimposed into a single three-dimensional waveform;The chapterⅤdiscussed the high-speed continuous waveform capture design,describing the trigger and pre-trigger system and how to high-speed captured continuously waveform under the trigger system synchronization. The last chapter is the conclusion.the simulation results of the functional modules is given, the PCB Photos given too. |
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