This is a somewhat contrarian statement--I'd like some explanation and examples of what you mean.
I find a x10 amplifier with high Zin, low Zout, low noise, low error, and constant delay to be interesting enough.
Every circuit is non-linear when used outside its design limits, but this hardly needs asserting.
And of course real devices are not perfect. Resistors have inductance and capacitance and a thermal coefficient, capacitors likewise have flaws, wires have resistance and self-inductance, and circuit layout gives you stray capacitance, crosstalk, and instability. Op amps themselves produce noise, have input currents and offset voltages and limited slew rate and bandwidth. And so on, and on.
But again, none of that needs asserting.
While you certainly can design lot of deliberately non-linear circuits with op amps and non-linear devices in their feedback paths, it's difficult to design linear circuits without them, or instead with circuits, the core of which end up looking like simplified op-amps.
So, what did you have in mind when you said "the various non-linear behaviours"?
I find a x10 amplifier with high Zin, low Zout, low noise, low error, and constant delay to be interesting enough.
Every circuit is non-linear when used outside its design limits, but this hardly needs asserting.
And of course real devices are not perfect. Resistors have inductance and capacitance and a thermal coefficient, capacitors likewise have flaws, wires have resistance and self-inductance, and circuit layout gives you stray capacitance, crosstalk, and instability. Op amps themselves produce noise, have input currents and offset voltages and limited slew rate and bandwidth. And so on, and on.
But again, none of that needs asserting.
While you certainly can design lot of deliberately non-linear circuits with op amps and non-linear devices in their feedback paths, it's difficult to design linear circuits without them, or instead with circuits, the core of which end up looking like simplified op-amps.
So, what did you have in mind when you said "the various non-linear behaviours"?