一种宽带非福斯特电路设计与实现

对一种负阻抗变换器(NIC)来实现宽带非福斯特电路特性进行了理论分析,给出了NIC的稳定性工作条件.以宽带运算放大器为核心设计了宽带非福斯特电路,对电路进行了时域和频域仿真,提出了一种负阻抗等效测试方法.仿真和测试结果都表明,设计的宽带非福斯特电路可以在几十倍频程带宽内实现负阻抗变换,且电路简单,具有很高的稳定性,证实了理论分析的正确性和有效性.

Design and implementation of a broadband non-Foster circuit

In order to get the stable conditions of negative impedance converters(NIC),theoretical analysis was done on how to realize broadband non-Foster circuit characteristics with NIC.A broadband non-Foster circuit was designed with wideband operational amplifier as the central part.After time domain and frequency domain simulation on the circuit,a negative impedance equivalent measurement method was brought forward.Both the simulation and measurement results indicate that the non-Foster circuit design can realize the negative impedance conversion with the bandwidth up to dozens of octaves.With simple circuit and high stability,the theoretical analysis is proved to be correct and efficient.