Astable Multivibrator Applications, Advantages and Circuit Diagram
The main applications of Astable Multivibrator are Wave Generation Circuits, frequency Modulations, Timing Circuits, etc. In this article, you will find a lot of Astable Multivibrator Applications and advantages. Here you will find also the circuit diagrams of Astable Multivibrator used for different purposes.
An Astable Multivibrator
circuit is basically an oscillator circuit which can produce a continuous
rectangular wave as its output. The astable multivibrator does not need any
external triggering for its operation. As this multivibrator circuit cannot
produce any stable state that is why it is called Astable Multivibrator.
Applications of Astable Multivibrator
1. The Astable
Multivibrator circuit mainly used as a continuous wave generation circuit.
2. Astable Multivibrators
are used in Frequency Modulation Circuits.
3. Astable Multivibrators
are used in analog as well as digital timer Circuits.
4. They are also used in
Voltage to Frequency converter circuits.
5. Astable Multivibrator
circuit can generate also Square Wave, for this reason, they are used in
digital transmission, receiver, television broadcast, etc.
6. They are used for pulse
synchronization or pulse position modulation.
7. They are used as timing
oscillator or clock in a computer system.
8. They are used in Radio
Equipment such as Transmitter and Receiver Circuit.
9. In earlier days, astable
multivibrators are used for morse code generation.
10. They are used in
digital Flip-Flop Circuits, Electronic Register Circuits.
11. They are used in
flashing lights, automatic switching circuits.
12. They are used for speed
control of DC motor with Pulse Width Modulation Technique.
Advantages of Astable Multivibrator
1. They are very simple in
design.
2. They are very reliable.
3. They are very easy to
construct with a very low cost.
4. They do not need any
external triggering.
5. They can run
continuously for a very large amount of time without any problem.
Disadvantages of Astable Multivibrator
The continuous pulse
generation by this multivibrator circuit depends upon the positive feedback. So
due to the resistance in the circuit, this multivibrator cannot transfer the
whole output signal to the input. So a small amplifier circuit is used with this
multivibrator circuit which restores the lost energy.
Astable Multivibrator Circuit Diagram
Here you can see the simple
astable multivibrator circuit using Bipolar Junction Transistor(BJT).
Here you can see the
astable multivibrator circuit using IC 555. Here the duty cycle of the output
pulses can be varied by varying the resistance R1.
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Astable Multivibrator Applications, Advantages and Circuit Diagram
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