设计多频点,高隔离开关用于微通道板数据采集数据的设计
Yihao Yang1,2, Yongsheng Gou1,2, Yang Yang1,2
1Universiy of Chinese Academy of Sciences, Beijing, China.
The Review of scientific instruments
|October 25, 2023
概括
这项研究设计了一种高隔离无线电频率 (RF) 开关,使用金属氧化物半导体场效应晶体管 (MOSFET) 来取代X射线摄像机中的光屏. 新的设计最大限度地减少了信号输入,并确保了信号完整性,以改善相机读出电路.
科学领域:
- 电气工程 电气工程
- 物理 物理学 物理
- 仪器化 仪器化 仪器化
背景情况:
- 靠近门的X射线摄像机中的光屏对先进的读数有局限性.
- 集成时间间隔读出电路需要高性能开关组件.
研究的目的:
- 设计一种高隔离无线电频率 (RF) 开关,能够取代X射线摄像机中的光幕.
- 解决金属氧化物半导体场效应晶体管 (MOSFET) 交换电路中寄生电容引起的信号输入问题.
主要方法:
- 一个金属氧化物半导体场效应晶体管 (MOSFET) 切换电路被设计为在0.5-3 GHz之间工作.
- 采用并行共振来增强高隔离的电压分割.
- 系列共振被用来有效地泄漏电流,进一步改善隔离.
主要成果:
- 设计的射频开关在1 GHz实现了76 dB的隔离和0.07 dB的插入损失.
- 在0.5-3GHz频率范围内,隔离超过33dB.
- 该电路有效地减轻了由MOSFET寄生电容引起的信号输入.
结论:
- 开发的高隔离RF开关有效地克服了X射线摄像头中传统光屏的局限性.
- 响应电路设计可确保可靠的信号传输和高隔离时间间隔的读出应用程序.
- 这一进步促进了现代读出电子与X射线成像系统的整合.
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