American Journal of Electrical and Electronic Engineering

OTA-C Sinusoidal oscillators are useful for implementation in both bipolar and CMOS technologies due to the complete absence of passive resistors, requirements of only OTAs and integratable MOS capacitors in their design with the advantageous feature of providing electronic tunability of the oscillation frequency through external current/voltage signal. In particular, the oscillator circuit topologies which employ a minimum number of OTAs (no more than three) along with a minimum number of capacitors (no more than two), along with both capacitors being grounded, are particularly attractive from the view point of IC implementation. This article shows how, starting from various known three-OTA-C oscillators, even if this may not be employing both grounded capacitors, new three-OTA-grounded-capacitor (TOGC) versions can be derived systematically using a theoretical framework based upon nullors. The workability of the new TOGC oscillator configurations has been confirmed by SPICE simulations based upon CMOS OTAs using 0.18µm CMOS technology process parameters and some sample results have been presented.

American Journal of Electrical and Electronic Engineering. 2015, 3(6), 137-146. DOI: 10.12691/ajeee-3-6-2
Pub. Date: December 04, 2015

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Electrodynamics Settings of the Communicator

by V.G. Kudrya

Original Research

Studied electromagnetic properties of connections between component. The analysis of electromagnetic field components parallel radial highway lanes of the printed and volumetric mounting electronic devices. Found conversion algorithms mutual capacitive, inductive, dielectric and semiconductor parameters of the symmetric and regular communication structures.

American Journal of Electrical and Electronic Engineering. 2015, 3(6), 130-136. DOI: 10.12691/ajeee-3-6-1
Pub. Date: December 02, 2015

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