I am not an IC designer but I would like to, for fun, simulate and lay out a circuit by hand that I can actually understand.
To get a head start, where do you suggest I find a small (ten, maybe twenty transistors) sized circuit that I can actually understand (being a business major)?
I found plenty of unsized circuits - which are, in reality, topologies with missing parts - but - I was hoping to start with a working cmos IC circuit that works out of the box so that when I simulate it, I could learn what it is doing - and - so that I could begin to lay it out based on the actual lengths and widths in the simulated schematic.
Is there a web-available source for very simple sized analog schematics for learning purposes (i.e., something more than just a digital inverter block, e.g., an analog op amp, band gap, comparator, vco, pll, etc.)?