Journal ArticleDOI
Highpass and bandpass filters using a new single-amplifier simulated inductor
TLDR
In this paper, a single-amplifier single-capacitor circuit simulating a grounded inductor for use in active RC high-pass and band-pass filters is discussed, and a method of compensating for the nonideal behaviour of simulated inductors of this type is presented.Abstract:
A new single-amplifier single-capacitor circuit simulating a grounded inductor, for use in active RC highpass and bandpass filters, is discussed, and a method of compensating for the nonideal behaviour of simulated inductors of this type is presented. In contrast to known compensation methods, the compensation procedure proposed here does not seek to improve the nonideal simulated inductors, but deliberately designs the simulating circuit to have a specific biquadratic impedance function and then modifies the filter circuit so as to produce the required loss/frequency response using these biquadratic impedances instead of the original inductors. For bandpass filters the compensation is only approximate. However, for highpass filters, complete compensation can be achieved over the entire frequency range in which the gain of the amplifier can be adequately described by a single-pole model; the cost of achieving this is some increase in sensitivity. The new design procedure has been applied successfully to a 5th-order Cauer-type highpass filter; computed incremental sensitivities and some measured results are presented.read more
Citations
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Journal ArticleDOI
Generation of new two-amplifier synthetic floating inductors
TL;DR: In this paper, a two-amplifier lossless floating inductance (LFI) realisation with only two operational amplifiers has been achieved and a procedure by which a number of new two-AMplifier LFI configurations are derivable.
Journal ArticleDOI
On the realization of immittance inverters with a minimum number of active components
TL;DR: In this article, it was shown that a grounded positive inverter cannot be realized with only one operational amplifier or one ideal transistor, and that positive inverters can be realized using only one amplifier if only one port is grounded.
Journal ArticleDOI
On the transformation of grounded inductors to floating inductors using ofa and fccii
TL;DR: Earlier works on the same topic published about 24 years back which are closely related to the work reported in Soliman's paper but have not been cited therein are brought on record.
Book ChapterDOI
Nullors, Their Bipolar and CMOS Implementations and Applications in Analog Circuit Synthesis and Design
TL;DR: It is shown that judicious combinations of these pathological elements, a variety of active elements such as BJT, MOSFET, Op-amp, operational transconductance amplifier (OTA), CCII etc., can be modeled.
References
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Journal ArticleDOI
Realisation of gyrators using operational amplifiers, and their use in RC-active-network synthesis
TL;DR: The realisation of negative-impedance convertors and invertors using the bridge-type circuit using the nullor to infinite-gain controlled sources is briefly surveyed and a relevant theorem concerning passivity is proved.
Journal ArticleDOI
Loss-compensated active gyrator using differential-input operational amplifiers
TL;DR: A method of simulating grounded or floating inductance is described, which is dependent on invertor action associated with a well known T-π transformation, and which uses differential-input amplifiers.
Journal ArticleDOI
Synthesis of active RC networks
TL;DR: A basic theorem is derived for RC networks containing active elements that it is shown that no more than one active element, embedded in a passive RC network, is needed to realize any driving-point function.
Journal ArticleDOI
New active-gyrator circuit
H. Orchard,A.N. Willson +1 more
TL;DR: In this paper, it has been shown that an ideal active gyrator can be made with only one amplifier, and its behaviour when used in an inductance-simulating mode is analyzed.
Journal ArticleDOI
Multipurpose simulation network with a single amplifier
C.E. Schmidt,Man Shek lee +1 more
TL;DR: A network consisting of an operational amplifier, one or two capacitors and several resistors can be connected to form several f.n.r. circuits or an inductance-simulation circuit as discussed by the authors.