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Synthesis of active LTV elements

Piwowar Anna, Walczak Janusz

Archives of Electrical Engineering

2020

Vol. 69, nr 3

487--498

The article proposes the method of synthesis of active elements with timevarying parameters R(t), C(t) and L(t). In order to construct the elements, it is necessary to use operational amplifiers, multipliers and classic RLC components. The variability in time of the elements results from applying voltage to control terminals. Assuming that the parameters of elements R(t), L(t), C(t) are exponentially varying, dependencies describing the control voltage waveforms which enable such a parameter variability were determined. The obtained results were illustrated with examples and PSpice simulations.