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

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creativework.keywordsContemporary circuits, Operational amplifiers, Voltages
creativework.publisherInstitute of Physics Publishinghelen.craven@iop.orgen
dc.contributor.authorMishonov T.M.
dc.contributor.authorDanchev V.I.
dc.contributor.authorPetkov E.G.
dc.contributor.authorGourev V.N.
dc.contributor.authorDimitrova I.M.
dc.contributor.authorSerafimov N.S.
dc.contributor.authorStefanov A.A.
dc.contributor.authorVaronov A.M.
dc.date.accessioned2024-07-10T14:27:04Z
dc.date.accessioned2024-07-10T14:49:31Z
dc.date.available2024-07-10T14:27:04Z
dc.date.available2024-07-10T14:49:31Z
dc.date.issued2019-03-01
dc.description.abstractThe time dependent master equation from the seminal article by Ragazzini, Randall and Russell (Ragazzini et al 1947 Proc. of the I.R.E. 35, 444–452) is recovered as a necessary tool for the analysis of contemporary circuits with operational amplifiers. This equation gives the relation between time dependent the output voltage U0(t) and the difference between the input voltages (U+(t ) and U-(t )). The crossover frequency f0 is represented with the time constant τ in this equation. The work of the 0 master equation is illustrated by two typical examples: a) the stability criterion of the devices with negative impedance converters, which we consider as a new result b) the frequency dependence of the amplifiers with operational amplifiers given in the technical specifications without citations of the time dependent equation. A simple circuit for determination of f0 is suggested and the method is illustrated by determination of crossover frequency for the low-noise and high speed ADA4898 operational amplifier. It is concluded that for an exact calculation of the pass bandwidth of amplifiers with active filters the 70 years old master equation is a useful technique implicitly included in the contemporary software. The frequency dependent formulae for the amplification coefficient of inverting and non-inverting amplifiers are given for the case of non-zero conductivity between the inputs of the operational amplifiers.
dc.identifier.doi10.1088/2399-6528/ab050b
dc.identifier.issn2399-6528
dc.identifier.scopusSCOPUS_ID:85078359162en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/567
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85078359162&origin=inward
dc.titleMaster equation for operational amplifiers: Stability of negative differential converters, crossover frequency and pass-bandwidth
dc.typeArticle
oaire.citation.issue3
oaire.citation.volume3
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