Basic introduction of monostable multivibrator

Crystal oscillator

Quartz Oscillator 3225 20M OSC

Multivibrator: Using deep positive feedback, the two electronic devices are alternately turned on and off by RC coupling, thereby generating a square wave output oscillator. Often used as a square wave generator. A multivibrator is a self-excited oscillator that produces a rectangular wave, also called a rectangular wave generator. "Multi-harmonic" means that the rectangular wave contains rich harmonic components in addition to the fundamental component. The multivibrator has no steady state and only two transient states. In operation, the state of the circuit is automatically alternated between the two transient states, thereby producing a rectangular wave pulse signal, often used as a pulse signal source and a clock signal in the sequential circuit.