Delete comment from: Ken Shirriff's blog

Moosteron said...

Possibly the best lab experiment I did as an EE undergraduate was to view a 741 under an electron microscope, as I recall as SEM but with the beam switched off. It was fed with a low frequency (0.1Hz maybe) sine wave and was in open loop. So you could see the input stages gradually getting lighter and darker as the charge on them accumulated and dissipated, while the output stages would flip back and forth between light and dark as they were saturating. I think it's the only time I have seen visual evidence that electronics really works at a physical level.

Nov 12, 2015, 3:58:38 PM

Posted to Understanding silicon circuits: inside the ubiquitous 741 op amp