Multi-Channel Amplifier-Discriminator for Highly Time-Resolved Detection
Multi-Channel Amplifier-Discriminator for Highly Time-Resolved Detection
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DOI：
10.1109/tns.2010.2100409
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发表时间：
2011-02-01
影响因子：
1.8
通讯作者：
Lapington, J.
中科院分区：
文献类型：
--
作者：
Despeisse, M.;Powolny, F.;Lapington, J.
设计了一种适用于高时间分辨检测系统的低功耗多通道放大鉴别器。提出的电路体系结构，即所谓的Nino，是基于超阈值方法的，并显示出在固态光电探测器和基于真空技术的探测器的时间分辨读出方面的高潜力。IRPICS电路采用250 nm CMOS工艺设计，实现了32个通道的尼诺版本，经过优化可在输出低电压差分信号(LVDS)上实现高时间分辨率，同时保持每通道10 mW的低功耗。该电路的电学特性显示，输出脉冲前沿的本征时间抖动非常低，对于高输入信号电荷(100 FC)的每个通道测量的时间抖动低于10 ps RMS，对于低输入信号电荷(20-100 FC)的每个通道测量的时间抖动低于25 ps RMS。此外，读出体系结构允许从定时测量取回输入信号电荷，同时开发校准程序以校正输出脉冲的时间行走变化。因此，IRPICS电路在需要高时间分辨率的多通道检测系统中显示出很高的应用潜力，如飞行时间系统(TOF)、正电子发射断层扫描(PET)或时间分辨光谱分析所需要的。
A low-power multi-channel amplifier-discriminator was developed for application in highly time-resolved detection systems. The proposed circuit architecture, so-called Nino, is based on a time-over-threshold approach and shows a high potential for time-resolved readout of solid-state photo-detectors and of detectors based on vacuum technologies. The Irpics circuit was designed in a 250 nm CMOS technology, implementing 32 channels of a Nino version optimized to achieve high-time resolution on the output low-voltage differential signals (LVDS) while keeping a low power consumption of 10 mW per channel. Electrical characterizations of the circuit demonstrate a very low intrinsic time jitter on the output pulse leading edge, measured below 10 ps rms for each channel for high input signal charges (100 fC) and below 25 ps rms for low input signal charges (20-100 fC). The read-out architecture moreover permits to retrieve the input signal charge from the timing measurements, while a calibration procedure was developed to correct for time walk variations of the output pulses. The Irpics circuit therefore shows a high potential of application in multi-channel detection systems requiring a high time resolution, as needed for Time Of Flight systems (TOF), Positron Emission Tomography (PET) or time-resolved spectroscopy.