Lossless ungrounded inductor realisation

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Lossless ungrounded inductor realisation

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© The Institution of Electrical Engineers
Published

A simple, cheap realisation of a lossless (positive or negative) inductor is given, using three operational amplifiers in identical configurations, one grounded capacitor and four equal resistors. Experimental measurements on two filter sections confirm the theory. The losslessness is shown to depend on only two of the resistors being matched.

Inspec keywords: active networks; inductance

Other keywords: operational amplifiers; filter sections; lossless ungrounded inductor realisation

Subjects: Active filters and other active networks

References

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      • A.W. Keen , J.L. Glover . Synthesis of the ungrounded inductor with grounded amplifier realisations. Radio & Electron. Eng. , 53 - 59
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      • T. Murata , R. Rikoski . Mutator simulated floating inductors. Int. J. Electron. , 229 - 232
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      • A. Antoniou . Floating negative-impedance convertors. IEEE Trans. , 209 - 212
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      • R.H.S. Riordan . Simulated inductors using differential amplifiers. Electron. Lett. , 50 - 51
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      • D.R. Wise . Active simulation of floating lossy inductances. Proc. IEE , 1 , 85 - 87
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      • J. Gorski-Popiel . RC active synthesis using positive-immittance convertors. Electron. Lett. , 381 - 382
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