Design of analog front end for high count rate neutron detection

ZHANG heng; YIN Tao; LU Xin; LI Qian-yu; CHEN Ji-ping; YANG Hai-gang

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Design of analog front end for high count rate neutron detection

更新时间：2026-09-04

- Design of analog front end for high count rate neutron detection
- Vol. 37, Issue 12, Pages: 33-37(2020)
- 作者机构：
  
  1. 中国科学院机构空天信息创新研究院,北京,100094
  2. 中国科学院大学机构,北京,101408
  3. 中国科学院半导体研究所,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2020
- 稿件说明：
移动端阅览
张恒, 尹韬, 卢新, 李芊宇, 陈纪平, 杨海钢. 用于高计数率中子检测的模拟前端的设计[J]. 微电子学与计算机, 2020, 37(12): 33-37.

ZHANG heng, YIN Tao, LU Xin, et al. Design of analog front end for high count rate neutron detection[J]. 2020, 37(12): 33-37.
张恒, 尹韬, 卢新, 李芊宇, 陈纪平, 杨海钢. 用于高计数率中子检测的模拟前端的设计[J]. 微电子学与计算机, 2020, 37(12): 33-37. DOI：

ZHANG heng, YIN Tao, LU Xin, et al. Design of analog front end for high count rate neutron detection[J]. 2020, 37(12): 33-37. DOI：

摘要

针对具有1 nF传感电容和5 μA平均幅度的随机电流脉冲的核探测器，设计了一种基于跨阻放大器(TIA)的模拟前端.核心放大器采用单端折叠共源共栅结构提高带宽和速度，采用增益增强(gain-boosted)技术以满足高增益的要求.模拟前端基于SMIC 40 nm CMOS工艺设计实现，仿真结果表明，核心放大器在电源电压1.1 V下，增益带宽积为2.2 GHz，增益为72.3 dB

模拟前端在闭环增益为500 Ω和1 nF传感电容时，可以实现22 MHz的闭环带宽，模拟前端的总功耗为3.2 mW.

Abstract

For a nuclear detector with a 1nF sensing capacitor and a random current pulse with an average amplitude of 5μA

this article designs an analog front end based on a transimpedance amplifier (TIA). The core amplifier uses a single-ended folded cascode structure to increase its bandwidth and speed

and uses gain-boosted technology to achieve its high gain requirements. The analog front-end is designed and implemented based on the SMIC 40nm CMOS process. The simulation results show that the core amplifier has a gain-bandwidth product of 2.2 GHz and a gain of 72.3 dB at a power supply voltage of 1.1 V. When the analog front-end has a closed-loop gain of 500 Ω and a 1 nF sensing capacitor

it has a closed-loop bandwidth of 22 MHz

the total power consumption of the analog front-end is 3.2 mW.

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references

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