Beyond generation, transistors refine the "quality" of pulses:
The "deep" logic of a transistor in a pulse circuit relies on transitioning rapidly between two non-linear states: Transistors in Pulse Circuits
Uses two cross-coupled transistor inverters with capacitors to create a "self-excited" oscillation. The capacitors alternately charge and discharge, causing the transistors to flip-flop between ON and OFF states without an external trigger, generating a continuous square wave. generating a continuous square wave.