摘要
为解决共振隧穿二极管(RTD)振荡功率的提高受到稳定性限制的问题,利用高级设计系统(ADS)电路仿真,研究了 RTD 分别与 RLC(电阻、电容、电感)、HEMT(高电子迁移率晶体管)及 HBT(异质结双极晶体管)构成的大信号振荡电路,分析了其负阻、双稳特性产生振荡的机理,探索了 RTD 的连接器件对 RTD 特性的调制作用。研究表明,振荡电压(或电流)的峰值与谷值之差越大,输出电压(或电流)的振荡幅度就越大,且比单纯增大RTD 结面积来增大输出功率的做法有更好的稳定性,据此有望解决功率受限的问题;RTD连接的器件对 RTD 特性的调制作用与连接方式有关,通过改变连接方式可以扩大 RTD 在射频收发系统中的应用。
To solve the problem of output power limitation and instability latent in resonant tunneling diode （RTD） based oscillating circuit, advanced design system （ADS） software is employed to study the large signal oscillation based on the RTD combined with RLC （resistance capacitance and inductor）, high electron mobility transistor （HEMT） and heterostructure bipolar transistor （HBT）, analyzing the mechanism of negative resistance oscillation and exploring the modulation effect on the RTD＇s characteristics by other three-terminal devices. It is proved that the large signal oscillation from peak to valley on RTD＇ s Ⅰ- Ⅴ curve is promising to solve the power limitation problem without decreasing the stability in RTD. At the same time, using the modulation effect on RTD by other three terminal devices, different voltage-controlled oscillation circuit （VCO） from conventional LC VCO can be realized , thus these circuits can be used extensively in radio frequency （RF） and microwave （MW） domain.
出处
《高技术通讯》
CAS
CSCD
北大核心
2008年第9期938-942,共5页
Chinese High Technology Letters
基金
国家自然科学基金(60536030)资助项目
