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Electronics Circuits – Multivibrator

A multivibrator is an electronic circuit that generates continuous square wave or rectangular wave oscillations. It is a type of waveform generator. It is commonly used in electronic circuits for various purposes. (Signal generation, timing, and pulse generation).

There are two main types of multivibrators: astable and monostable.

Astable Multivibrator:

  • An astable multivibrator is a free-running oscillator circuit that continuously switches between two states without any external input.
  • It has two distinct voltage levels, typically high and low.
  • The circuit consists of two cross-coupled amplifying devices (such as transistors or op-amps) and a feedback network.
  • The output waveform is a square wave. It’s an equal amount of time spent with each state.

Monostable Multivibrator:

  • A monostable multivibrator, also known as a one-shot multivibrator.
  • It has only one stable state.
  • Once triggered, it remains in the unstable state for a predetermined period before returning to the stable state.
  • Common applications include pulse generators, time delay circuits, and pulse-width modulation.
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