摘要
针对强流环境下时间投影室TPC(Time Projection Chamber)探测器高计数率、大动态范围、低功耗的读出需求,基于180 nm CMOS工艺设计了一种自动调节增益的前放芯片。该芯片由电荷灵敏前放CSA(Charge Sensitive Amplifier)、Class AB输出缓冲级、增益控制模块、触发控制模块构成。通过片内逻辑信号控制多个开关的切换,使芯片的转换增益自适应输入电荷量;并通过开关泄放,使芯片工作于1 MHz计数率。经过后仿真,在输入信号范围为2.2~16.5 pC时,积分非线性好于0.4%。该芯片已经提交foundry流片。
To meet the readout requirements of high counting rate,large dynamic range,and low power consumption for Time Projection Chamber(TPC)detectors in high-intensity environments,a preamplifier chip with automatic gain adjustment was designed based on a 180 nm CMOS process.The chip consists of a Charge Sensitive Amplifier(CSA),a Class AB output buffer stage,a gain control module,and a trigger control module.Through on-chip logic signals controlling the switching of multiple switches,the chip’s conversion gain adapts to the input charge level.Additionally,switch bleeding enables the chip to operate at a counting rate of 1 MHz.Post-layout simulations show that the chip achieves an integral nonlinearity better than 0.4%across an input signal range of 2.2 to 16.5 pC.The chip has been submitted for foundry fabrication.
作者
刘政强
千奕
蒲天磊
孙志坤
杨鸣宇
陆伟建
张家瑞
穆麓妃
LIU Zhengqiang;QIAN Yi;PU Tianlei;SUN Zhikun;YANG Mingyu;LU Weijian;ZHANG Jiarui;MU Lufei(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Guangdong Provincial Laboratory of Advanced Energy Science and Technology,Huizhou 516000,Guangdong,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China)
出处
《原子核物理评论》
北大核心
2025年第2期320-327,共8页
Nuclear Physics Review
基金
国家自然科学基金资助项目(11975293,12105338)
甘肃省重点人才项目(2024RCXM61)。
