Astable Multivibrator Circuit Using Transistor. An astable multivibrator circuit also termed as a regenerative switching circuit is an electrical circuit that switches between high and low states continuously. The astable circuit consists of two switching transistors a cross coupled feedback network and two time delay capacitors which allows oscillation between the two states with no external triggering to produce the change in state.
The astable multivibrator circuit we will build with transistors is shown below. The output of the astable multivibrator circuit is a square wave that goes on indefinitely. An astable multivibrator circuit also termed as a regenerative switching circuit is an electrical circuit that switches between high and low states continuously.
Astable multivibrator using transistors working after a time period determined by r1c1 time constant the capacitor c1 discharges completely and starts charging in reverse direction through r1.
So we use 2 transistors in this circuit for operation. The astable circuit consists of two switching transistors a cross coupled feedback network and two time delay capacitors which allows oscillation between the two states with no external triggering to produce the change in state. When the capacitor c1 charges to a voltage sufficient provide base emitter voltage of 0 7v to the transistor q2 it turns on and capacitor c2 starts dischargeing. How this circuit works is through the rc network of the resistor and capacitor.
