So I'm building a thingy that has an opamp plus an external jiggery-pokery apparatus inside the feedback loop, and I want the complete assembly to be super stable (PM >> 45 deg) with little to no overshoot or ringing on the small signal square wave response (PM >= 65 deg).
Besides the externally compensated opamps that let you create whatever phase margin you wish (LM301, AD744, NE5534A but not '32), simply by adding an external compensation cap, what have YOU used to get big ole bohunker phase margin? Which chips?
AD817 and AD825 might possibly be two possible candidates (what do you think) ... neither of which is modeled in LTSPICE today.
Besides the externally compensated opamps that let you create whatever phase margin you wish (LM301, AD744, NE5534A but not '32), simply by adding an external compensation cap, what have YOU used to get big ole bohunker phase margin? Which chips?
AD817 and AD825 might possibly be two possible candidates (what do you think) ... neither of which is modeled in LTSPICE today.
if you can afford an RC (inverting) or two (for non inverting) you can build an integrator around the op amp, but inside the global loop
Consider also AD8008 , if output swing 10vp-p is sufficient. it has 100khz open loop F-3db , can be used with unity gain above 400Mhz . As CFA the open loop gain can be adjusted by the negative input source impedance. Spice model available.
