Realizing wideband negative inductor using current feedback amplifier

ABSTRACT 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 st...

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Bibliographic Details
Published in:Microwave and optical technology letters 2016-07, Vol.58 (7), p.1723-1728
Main Authors: Xia, Zhenxing, Li, Meiling, Qi, Zhu
Format: Article
Language:English
Subjects:
active inductors
Circuits
Feedback
Inductors
Microwaves
Networks
non-Foster circuits
R-H criterion
Routh-Hurwitz criterion
stability analysis
Stabilization
Wideband
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Summary:ABSTRACT 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. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1723–1728, 2016
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.29896