@ARTICLE{ iet:/content/journals/10.1049/joe.2013.0200, author = {Raj Senani}, author = {Manish Gupta}, author = {Data Ram Bhaskar}, author = {Abdhesh Kumar Singh}, keywords = {CMOS OTAs;explicit-current-output quadrature oscillators;size 0.18 mum;single operational transconductance amplifier-RC sinusoidal oscillators;equivalent form generation;single-OTA-RC sinusoidal oscillators;equivalent op-amp oscillator circuits;dual-OTA-RC sinusoidal oscillators;GC;SPICE simulations;grounded capacitors;CMOS technology process;characteristic equation;nullor-based theory;}, language = {English}, abstract = {It has been shown in two earlier papers published from this study that corresponding to a given single-operational trans-conductance amplifier (single-OTA)-RC and dual-OTA-RC sinusoidal oscillators, there are three other structurally distinct equivalent forms having the same characteristic equation, one of which employs both grounded capacitors (GC). In this study, an earlier nullor-based theory of generating equivalent op-amp oscillator circuits, proposed by the first author, is extended to derive equivalent OTA-RC circuits which discloses the existence of an additional number of equivalent forms for the same given OTA-RC oscillators than those predicted by the quoted earlier works, and thereby considerably enlarging the set of equivalents of a given OTA-RC oscillator. Furthermore, the presented nullor-based theory of generating equivalent OTA-RC oscillators results in three additional interesting outcomes: (i) the revelation that corresponding to any given OTA-RC oscillator there are two ‘both-GC’ oscillators (and not merely one, as derived in the quoted earlier works); (ii) the availability of explicit current outputs in several of the derived equivalents and (iii) the realisability explicit-current-output ‘quadrature oscillators’ in some of the generated equivalent oscillators. The workability of the generated equivalent OTA-RC oscillators has been verified by SPICE simulations, based on CMOS OTAs using 0.18 µm CMOS technology process parameters, and some sample results are given.}, title = {Generation of equivalent forms of operational trans-conductance amplifier-RC sinusoidal oscillators: the nullor approach}, journal = {The Journal of Engineering}, issue = {6}, volume = {2014}, year = {2014}, month = {June}, pages = {324-331(7)}, publisher ={Institution of Engineering and Technology}, copyright = {This is an open access article published by the IET under the Creative Commons Attribution-NoDerivs License (http://creativecommons.org/licenses/by-nd/3.0/)}, url = {https://digital-library.theiet.org/;jsessionid=cl727q1377fk.x-iet-live-01content/journals/10.1049/joe.2013.0200} }