vssa squarewave response

MarcelvdG, i have done some stability tests, using a 10KHz square output at 0.4Vpp.
with no input filter and no zobel, i got the amp to oscillate with a cap of 1nF
the oscillation can be stopped with the use of the input filter 220p, or the zobel 1n/10R or a 0.8uH output inductor.