基于SCA ASIC的高精度时间测量原型电子学设计

基于高速波形数字化实现高精度时间测量是核与粒子物理实验读出电子学中的研究热点。本工作针对高精度时间测量的需求基于实验室自主研发的开关电容阵列(Switched Capacitor Array, SCA)专用集成电路(Application Specific Integrated Circuit,ASIC)开展16通道集成的时间测量电子学原型的设计，输入信号经过SCA采样和量化后传输至现场可编程逻辑阵列(Field Programmable Gate Array, FPGA)，在FPGA中进行误差修正、时间内插和数字甄别提取出时间信息。目前已在实验室环境下完成此电子学的时间精度测试，测试结果表明，此电子学可以实现好于10 ps RMS(Root Mean Square)的时间精度。

Design of High Precision Time Measurement Prototype Electronics Based on SCA ASICs

Precise time measurement based on high-speed waveform digitalization is a research hotspot in nuclear and particle physics experiment readout electronics. In this paper, a prototype of 16-channel time measurement electronics aiming for high-precision time measurement is designed, based on a Switched Capacitor Array(SCA) Application Specific Integrated Circuit(ASIC) designed by the laboratory where I am. After being sampled and digitized by the SCA ASIC, signals are directly transmitted to one Field Programmable Gate Array(FPGA), in which mismatch error correction, linear interpolation, and digital discrimination are integrated into it to extract the time information. The laboratory test results indicate that a time resolution of better than 10 ps RMS can be achieved in electronics.