I ma reading you following answer on Schmitt ｔｒｉｇｇｅｒ　oscillator, because I am thinking of using the oscillator's trnanglur ouput to power the tunnel diode when drawing the I-V curve.  
https://electronics.stackexchange.com/questions/533187/why-doesnt-the-following-circuit-have-negative-feedback

I found you description of the amplifier too difficult for me.  So I went to AAC (All About Circuits) for help.  I found AAC good for low IQ guys like me　：）: https://tunneldiode.blogspot.com/2020/12/lancaster-elegant-simplicity.html