1. The problem statement, all variables and given/known data Here is the problem: So this is a bistable multivibrator. 2. Relevant equations KVL and KCL laws 3. The attempt at a solution I don't entirely understand bistable multivibrators. I get what the solution is, the input voltage caps at 0.1V and the output caps at 0.7V and hysteresis occurs. Apparently, the output voltage will feed back into the + terminal of the op amp and this loops repeats itself until saturation... Why doesn't this happen with a regular non-inverting amplifier. The configuration is almost the same except the terminals are flipped... What does this mean? However, when I do some circuit analysis I notice that if the input is greater than 0.1V weird things happen. For example take a look at what I did here: So when you have 5V as the input, what happens to the current flow, does some of it just magically get capped? Another question I have is what is that 10k resistor right after the op amp used for?