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.