Electronic – Unexpected output from astable multivibrator


After following an answer to a question I asked here I created this circuit…


simulate this circuit – Schematic created using CircuitLab

This is the output on either of the transistor collectors.

enter image description here

Shouldn't I be getting a pretty crisp square wave with this configuration?

Best Answer

What you are trying to do is the ROSNER MODIFICATION to the astable multivibrater this was well before the internet and I cant find any reference to it and yes it can sharpen the collecter waveforms A sensible thing for you to do is to increase the caps by a factor of 10 and see some waveform improvement because the astable isn't used at high frequencies