Synchronization And Waveform Display Technology Of 10GSPS Oscilloscope

The rapid development of electronic information technology has made analog signals more and more sporadic and complex,it puts forward higher requirements for the indicators and functions of the acquisition system.As the most commonly used instrument in the field of electronic measurement,oscilloscopes are also evolving toward high sampling rates,high memory depths,and high waveform capture rates.In order to overcome the limitations of the performance of semiconductor devices,this paper uses time-interleaved sampling technology to build a high sampling rate acquisition system through multiple low-amplitude analog-to-digital conversion chips(ADCs).This paper uses external memory to increase the memory depth and designs three-dimensional imaging capabilities which greatly increases the waveform capture rate.This paper will mainly study and analyze the above aspects.It will solve the data synchronization problem in the process of time alternate sampling technology implementation,the waveform multi-segment storage problem and the collaborative work problem with the three-dimensional imaging module.It designs a multi-level luminance display function.The main structure of this paper is as follows:??The overall scheme is designed for High-definition acquisition system.A multi-channel sampling clock scheme is determined;Field_Programmable logic array(FPGA)is used to implement a high-speed data receiving scheme;High-speed serial bus(PCIe)is used to implement a software-hardware interaction scheme.Finally we confirm the complete system architecture of ADCs+ FPGAs+CPU.??The data synchronization scheme is designed.The reason why the data is not synchronized in the time alternate sampling is analyzed,and this paper designs a dedicated multi-ADC synchronous reset circuit,we advance the scheme for multi-FPGA data receiving and storage synchronization.Finally,the synchronization work in the front of the acquisition system is guaranteed.??Three-dimensional imaging module is designed under segmented storage.The waveform segmentation access module is designed by using the method of external memory(DDR3)to realize the multi-segment storage and variable depth storage function of the waveform.At the same time,two waveform three-dimensional imaging methods are designed to improve the capture capability of the incident waveform.Finally,the waveform segmentation storage is combined with the waveform three-dimensional imaging module to realize the waveform playback effect after mapping.??A Multi-level waveform luminance adjustment algorithm is designed in this paper.A RGB24-based waveform luminance adjustment algorithm is designed,which can realize 100-level luminance adjustment function,and more prominently reflect the probability of waveform appearance.A cross-color display scheme is designed to extend the display range.This paper completes the construction of the 10 GSPS acquisition system,and completes the waveform acquisition,storage and display.The waveform under the segmentation storage can reach the set depth and the number of segments.After the three-dimensional imaging and brightness adjustment module processing,the image can more clearly reflect the waveform probability information,and the waveform brightness adjustment function is remarkable.