雪崩晶体管切换模式对固态脉冲源波形特征的影响
Zhenbo Cheng1,2, Hui Ning2, Chuanxiang Tang1
1Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
The Review of scientific instruments
|October 12, 2023
概括
这项研究阐明了马克思电路中的雪崩晶体管 (AT) 切换机制,揭示了电压坡模式 (VRM) 导致振荡. 将电路修改为使用基触发模式 (BTM) 消除了这些振荡,从而改善了纳米秒脉冲生成.
科学领域:
- 电气工程 电气工程
- 半导体物理 半导体物理
- 脉冲动力系统 脉冲动力系统
背景情况:
- 马克思电路对于使用固态脉冲源产生纳秒脉冲至关重要.
- 雪崩晶体管 (AT) 对输出脉冲特征的确切影响仍然不完全理解.
- 调查AT切换行为对于优化固态脉冲源性能至关重要.
研究的目的:
- 研究马克思电路内的雪崩晶体管 (AT) 的切换机制.
- 分析不同开关模式 (基本触发模式 - BTM,电压坡道模式 - VRM) 对脉冲特征的影响.
- 为增强输出脉冲参数控制提出修改的马克思电路设计.
主要方法:
- 模拟半导体设备的混合模式模拟以模拟AT开关.
- 对模拟模型的短暂切换特征进行实验验证.
- 对AT切换机制的分析,区分BTM和VRM.
主要成果:
- 模拟精度需要特定的宽度参数 (100微米) 用于AT模型在BTM,不同于物理尺寸.
- 在VRM中,由于在初始冲击电离过程中电场的增加,AT表现出更高的切换速度.
- VRM 切换可能会导致 AT 中的振荡,因为载波位置位于特定接口 (p-n0 或 n0-n+).
结论:
- 一个修改的马克思电路设计迫使所有AT在BTM中运行,抑制VRM诱导的振荡.
- 修改后的电路显著改善了输出脉冲的特性,将前沿从275 ps增加到1125 ps.
- 这项研究提供了优化固态脉冲源输出波形的关键方法.
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