On equivalent forms of single op-amp sinusoidal RC oscillators

It has been known that a given single op-amp RC sinusoidal oscillator has four distinctly different, equivalent, stable forms, This paper shows that with the op-amp replaced by a four terminal floating nullor, the number of such equivalent realizations of any given single op-amp oscillator are much more than four. Through some examples it is demonstrated that some of such additional realizations of a given op-amp oscillator, are likely to have some interesting properties not available in the usually derived four equivalent forms of the same oscillator, The theory is supplemented with examples and verified by SPICE simulations and experimental results.<
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