Application of a Gyrator-Type Circuit to Realize Ungrounded Inductors

Deboo, G. J.

doi:10.1109/tct.1967.1082673

Cited by 25 publications

(6 citation statements)

References 1 publication

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“…We analyze what the criterion for agitation of oscillations in parallel and sequential resonance circuits is. Our research completes the well-known patent [15].…”

Section: Discussionsupporting

confidence: 60%

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Master equation for operational amplifiers: stability of negative differential converters, crossover frequency and pass-bandwidth

et al. 2019

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0 1 - we obtain the well-known formulae equations (7) and (8) of [9], see also [20].Actually coincidence of equation (7) of [9] with equation (28) from our paper with reverse engineering gives a proof of our time dependent master equation equation (5). For frequencies much lower than the crossover frequency f crossover of the operational amplifier the amplification is in a wide band frequency independent Figure C1. Differential amplifier with a finite input resistance R a (non-zero input conductivity) of the operational amplifier.

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“…We analyze what the criterion for agitation of oscillations in parallel and sequential resonance circuits is. Our research completes the well-known patent [15].…”

Section: Discussionsupporting

confidence: 60%

“…Negative impedance converter built by operational amplifier according NASA patent[15]. For static voltages and negligible reciprocal open-loop gain G  the circuit gives for the ratio of input voltage and current U I RR R.…”

mentioning

confidence: 99%

Master equation for operational amplifiers: stability of negative differential converters, crossover frequency and pass-bandwidth

et al. 2019

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“…Z o = 50Ω) and a known Z = [(1/ R 1 ) + (1/2 R 2 )] − 1 , n can be calculated. Assume the driving network is a gyrator , . Its transmission matrix parameters are then

((), a) = ((), \begin{array}{c} center & 0 & r \\ center & 1 true/ r & 0 \end{array})

, where r is the gyration resistance.…”

Section: Special Cases and Validating Examplesmentioning

confidence: 99%

“…2. Assume the driving network is a gyrator [11], [12]. Its transmission matrix parameters are then a ð Þ ¼ 0 r 1=r 0 , where r is the gyration resistance.…”

Section: Validating Examplesmentioning

confidence: 99%

Calculating output impedance in linear networks without source nulling or load disconnect: the instantaneous output impedance

Elwakil

Maundy

2015

Circuit Theory & Apps

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Summary This paper derives exact expressions for the output impedance of a voltage‐excited (current‐excited) linear network without having to nullify (kill) the exciting source or disconnect the load. The derived expressions show that the instantaneous output impedance is both source and load dependent, but when the source is nullified, the output impedance becomes independent of the load, as expected. For some special networks, the output impedance is also independent of the load. The expressions are verified for a number of known circuit setups and experimentally on a gyrator‐based linear network, which has an output impedance that can switch between positive and negative values. Copyright © 2015 John Wiley & Sons, Ltd.

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“…The floating inductor can be simulated, according to [12], by exploiting the RC circuit with three operational amplifiers depicted in figure 5. High-precision resistors must be used in order to reduce circuit losses, and guarantee the twoterminal behaviour of the simulated inductor.…”

Section: Experimental Set-upmentioning

confidence: 99%

Passive damping of beam vibrations through distributed electric networks and piezoelectric transducers: prototype design and experimental validation

Dell’Isola

Maurini

Porfiri

2004

Smart Mater. Struct.

123

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The aim of this work is two-fold: to design devices for passive electric damping of structural vibrations by distributed piezoelectric transducers and electric networks, and to experimentally validate the effectiveness of such a damping concept. Two different electric networks are employed, namely a purely resistive network and an inductive-resistive one. The presented devices can be considered as distributed versions of the well-known resistive and resonant shunt of a single piezoelectric transducer. The technical feasibility and damping effectiveness of the proposed novel devices are assessed through the construction of an experimental prototype. Experimental results are shown to be in very good agreement with theoretical predictions. It is proved that the presented technique allows for a substantial reduction in the inductances used when compared with those required by the single resonant shunted transducer. In particular, it is shown that the required inductance decreases when the number of piezoelectric elements is increased. The electric networks are optimized in order to reduce forced vibrations close to the first resonance frequency. Nevertheless, the damping effectiveness for higher modes is experimentally proved. As well as specific results, fundamental theoretical and experimental considerations for passive distributed vibration control are provided.

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Application of a Gyrator-Type Circuit to Realize Ungrounded Inductors

Cited by 25 publications

References 1 publication

Master equation for operational amplifiers: stability of negative differential converters, crossover frequency and pass-bandwidth

Master equation for operational amplifiers: stability of negative differential converters, crossover frequency and pass-bandwidth

Calculating output impedance in linear networks without source nulling or load disconnect: the instantaneous output impedance

Passive damping of beam vibrations through distributed electric networks and piezoelectric transducers: prototype design and experimental validation

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