1st one is an example of Schmitt Trigger. So the x-fer characteristic will be that of Schmitt trigger with kind of hysteresis effect. And the 2nd one is a detailed diagram of 555 timer. So bro X-fer characteristic will be that of 555 timer with monostable vibrator in the configuration u have mentioned. I think so. It's been so long I studied this Ele. Ckt. subjects. Anyway.