基于FPGA的手持式数字存储示波器峰值采样技术

Technology of Peak Sampling from Hand-hold Storage Oscilloscope Based on FPGA

为了满足手持式数字示波器在较大时基下检测尖峰信号、消除混叠现象,利用FPGA内部大量逻辑单元完成峰值采样。提出峰值采样的实现方案,对其设计进行了详细描述,该系统在不采用额外硬件的基础上,实现了对采集信号的最大值与最小值进行判断,并存储在一定时间段内的峰值,具有很强的移植性和兼容性。最后给出了实现峰值采样的波形图,效果比较满意。

To satisfy the requirement for detecting the peak signal and eliminating aliasing in the hand-hold digital oscilloscope at the larger time base, a method utilizing a large number of internal FPGA logic cells to complete sampling peak was presented. The design of the system was described in detail. It realized the judgment of minimum and maxi- mum value without using additional hardware, and stored the peak value in a certain period of time. The system has very strong transplant and compatibility. Finally, the realized Waveform Graph is given, which is quite satisfactory.