标题： ALICE TPC探测器的前置放大器形状 显示英文标题

标题： The PreAmplifier ShAper for the ALICE TPC-Detector

摘要： 在本文中介绍了ALICE实验在LHC中的时间投影室(TPC)的前置放大器ShAper(PASA)。ALICE TPC PASA是一种集成了16个相同通道的ASIC，每个通道包括电荷敏感放大器(CSA)后接一个极点-零点网络、自适应偏置网络、两个二阶桥式T型滤波器、两个非反相电平移位器和一个启动电路。该电路优化用于检测器电容为18-25 pF。对于输入电容为25 pF的情况，PASA具有12.74 mV/fC的转换增益、160 ns的峰值时间、190 ns的FWHM、11.65 mW/ch的功耗和244e + 17e/pF的等效噪声电荷。该电路大约在600 ns内平稳恢复到基线。还实现了0.19%的积分非线性，输出摆幅约为2.1 V。芯片的总面积为18 mm$^2$，并采用AMS的C35B3C1 0.35微米CMOS技术实现。在将它们安装到ALICE TPC前端卡之前，对大约48000个PASA电路进行了详细表征测试。在ALICE TPC经过两年多的质子-质子和铅-铅碰撞运行后，PASA已证明满足所有要求。 显示英文摘要

摘要： In this paper the PreAmplifier ShAper (PASA) for the Time Projection Chamber (TPC) of the ALICE experiment at LHC is presented. The ALICE TPC PASA is an ASIC that integrates 16 identical channels, each consisting of Charge Sensitive Amplifiers (CSA) followed by a Pole-Zero network, self-adaptive bias network, two second-order bridged-T filters, two non-inverting level shifters and a start-up circuit. The circuit is optimized for a detector capacitance of 18-25 pF. For an input capacitance of 25 pF, the PASA features a conversion gain of 12.74 mV/fC, a peaking time of 160 ns, a FWHM of 190 ns, a power consumption of 11.65 mW/ch and an equivalent noise charge of 244e + 17e/pF. The circuit recovers smoothly to the baseline in about 600 ns. An integral non-linearity of 0.19% with an output swing of about 2.1 V is also achieved. The total area of the chip is 18 mm$^2$ and is implemented in AMS's C35B3C1 0.35 micron CMOS technology. Detailed characterization test were performed on about 48000 PASA circuits before mounting them on the ALICE TPC front-end cards. After more than two years of operation of the ALICE TPC with p-p and Pb-Pb collisions, the PASA has demonstrated to fulfill all requirements.