eatyourguitar wrote:for a TL072 is the shape of the clipping. one side will start to get non-linear when you kiss it gently and the other side will hard clip immediately. the voltage difference between the clipping points and the rails is very symmetrical on a TL072 compared to a 741.
This is interesting, sounds similar to the difference between clipping a BJT at saturation versus cut-off.
In looking back on my years of dabbling with electronics, I've taken the path of early stuff forward (this comes from being self taught & following my interests) - so I'm only recently forming up some deeper first hand experience with monolithic operational amplifiers beyond treating them as a comparator or aping some pre-existing circuit of some sort. In short, this shit is more exciting than it probably should be.
In the build I'm working on I've planted a trim pot across the voltage divider node of both of the Va & Vb virtual ground references, so I can swing the wiper around and fine tune the positioning a little. If as a result something interesting comes up I shall surely share on this thread.
I'm also departing a little bit from the schematic in that I'm deploying some old laser diodes I have for the clipping section. The laser diodes are natively configured as a cascading pair of diodes, but their join point is case common on the part - so that leg is clipped free and everything wrapped in shrink to produce a single diode of about a 2.6 volt drop. This might make any data I share surrounding the 741 stage only applicable to the build at hand.