Realizing wideband negative inductor using current feedback amplifier
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- 作者：Zhenxing Xia ; Meiling Li and Zhu Qi
- 关键词：active inductors ; non-Foster circuits ; R&ndash ; H criterion ; stability analysis
- 刊名：Microwave and Optical Technology Letters
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：58
- 期：7
- 页码：1723-1728
- 全文大小：542K
- ISSN：1098-2760
文摘
Firstly, a compact current feedback amplifier-based negative impedance converter (CFA-based NIC) was designed and its equivalent circuit was proposed. Secondly, to obtain a stable negative inductor, a stabilization network was developed and combined with the CFA-based NIC. Meanwhile, the stability of the combined circuit was analyzed in detail in the time domain by the method of Routh–Hurwitz criterion (R–H criterion). Finally, the prototype of the designed CFA-based NIC with stabilization network was fabricated. The measurement results had a good agreement with simulated results. The measurement results showed the negative inductivity of the input impedance over a wideband from 50 to 500 MHz. Especially, the equivalent inductor of the present circuit is −3.4 nH ± 10% from 200 to 500 MHz.