[quote author="bcarso"]Voltage noise will often be dominant though, as these one op-amp synthetic inductor circuits have fairly high noise gain.
Work at the lowest Z's practical to keep resistor thermal noise contribution small, [/quote]
Thermal resistor noise is the main problem of single opamp gyrator L's.
The RC that feeds the noninverting opamp input will appear as a parasitic in parallel to the simulated inductor, so in order to make the parasitics small, you'd want this RC to be high impedance. That will inevitably mean a lot of noise. A GIC circuit built from two opamps is much better.
and at as high of levels as possible---but keep an eye on the actual opamp output voltage swing to make sure there is headroom.
Also important: The opamp's input voltage swing (common mode range!), and the opamp's (hopefully lack of) phase inversal when common mode range is exceeded.
The problem here is that you have to go for a noninverting configuration, which means that your signal level = common mode voltage. Most opamps do very nasty things when their CM range is exceeded, like making a hard switch of their output voltage from negative rail to positive rail. That's much worse than just "hard clipping" when you overdrive it.
So you're in another dilemma: make th esignal large to get out of the noise, and make the signal small on order to avoid phase reversal at occasional clipping.
JH.