Astable Multivibrator Using Transistor Output Waveform. It never holds one state. The basic bipolar transistor bjt version of an astable multivibrator as shown in fig.
Astable multivibrator is called so because both the states present here are unstable i e quasi stable. Both transistors either npn or pnp in the multivibrator are biased for linear operation and are operated as common emitter amplifiers with 100 positive feedback. By definition an astable circuit is that one that oscillators between 2 states high and low over and over and over again indefinitely.
It constantly cycles from high to low high to low repeatedly.
Astable multivibrator using transistor it is free running oscillator which switches continuously between its two unstable states. It constantly cycles from high to low high to low repeatedly. It necessarily provides square wave as its output. Two transistors named q 1 and q 2 are connected in feedback to one another.
