Mutually coupled circuits based on modified voltage differencing
transconductance amplifier with tuneable characteristics
Abstract
The letter presents a new mutually coupled circuit (MCC) based on a
modified voltage differencing transconductance amplifier (MVDTA),
designed using the Gorski-Popiel technique [1]. The proposed
synthetic transformer (ST) circuit uses two MVDTAs as active elements,
and all passive elements are grounded — two capacitors and two
resistors. Thanks to the newly established coupling method-connections,
it is provided with independent electronic control of primary and
secondary self-inductance, as well as mutual inductance, via bias
voltages of MVDTAs. In addition, it is very easy to provide the
conditions by which symmetrical couplings are achieved. Thorough Pspice
simulation time and frequency domain analyses have been performed in
order to verify the theoretical analyses. A double-tuned band-pass
(DTBP) filter application is given to show the functionality of the
proposed MCC.