带增益的气体探测器读出ASIC的研制

设计了用于带增益的气体探测器比如GEM、RPC等读出的ASIC,实现对探测器信号的放大、成形和对后续实时采样ADC的驱动电路.电荷增益和成形时间可调,有利于探测器不同增益下性能的研究,也扩展了芯片的应用范围.由于成形电路引入的噪声变得显著,在低电荷增益下,ENC会随增益下降而增加.芯片采用Chartered 0.35μm2P4M CMOS工艺,论文介绍了芯片的详细设计和仿真结果.

Design of a Readout ASIC for Gas Detectors with Self-Amplification

A readout ASIC has been designed for gas detectors with self-amplification such as GEM and RPC. It provides amplification and shaping of the detector signals and buffers them to the free running ADCs. The charge gain and the shaping time can be adjusted. The programmability of gain and shaping time is very convenient for studying detector performance under different gas gain and also expands the application range of the chip. The ENC increases as charge gain decreases below 10mV/fC because the noise from the shaper becomes significant. The chip is designed in Chartered 0.35μm 2P4M CMOS process. Detailed design and simulation results are described in the paper.