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Course Title- Digital Electronic & Pulse Technique
Course Code- CSE-311
Presentation Topic - Multivibrators
Presented By- MD Ali Jaker
Department - Computer Science and Engineering
Batch- 10th Semester- 5th
ID- 220311024
Submitted To- Nigar Afsana
Designation- Lecturer
University of Creative Technology Chittagong
• A MULTIVIBRATOR is an
electronic circuit used to implement a
variety of simple two-state systems
such as oscillators, timers and flip-
flops.
• It is characterized by two amplifying
devices (transistors, electron tubes or
other devices)
• cross-coupled by resistors and
capacitors.
• It has two states low “0” & high “1”
Multivibrator
Basic types
There are three types of
multivibrator circuit
• Astable Multivibrator
• Monostable Multivibrator
• Bistable Multivibrator
Astable multivibrator
Astable, in which the circuit is not stable in
either state—it continuously oscillates from
one state to the other.
Due to this, it does not require an input
(Clock pulse or other).
Astable multivibrator
NAND Gate Astable Multivibrators
Applications
Astable multivibrators are used in amateur
radio equipment to receive and transmit
radio signals. Astable multivibrators are also
used in morse code generators, timers, and
systems that require a square wave,
including television broadcasts and analog
circuits.
Advantages
Astable multivibrators continuously switch
between one state and another. This allows
astable multivibrators to power themselves and
perform work at a consistent rate without
influence from any outside forces or events.
Additionally, astable multivibrators are
inexpensive to produce, are relatively simple in
design, and can remain functional for
extraordinary amounts of time.
Disadvantages
Astable multivibrators do not transfer the entire
output signal to the input. This is due to resistance
within the circuit, lack of a completely closed loop at
the output terminals, and the tendency for one
capacitor or transistor to absorb energy at a slightly
different rate than the other. Although the amplifier
restores the lost energy when it amplifies the signal,
the signal will eventually be too small to be of any
use.
Bistable Multivibrator
Bistable Multivibrators circuit, both states are stable,
and the circuit will remain in either state indefinitely.
This type of Multivibrator circuit passes from one state
to the other "Only" when a suitable external trigger
pulse T is applied and to go through a full "SET-
RESET" cycle two triggering pulses are required.
Bistable Multivibrator
NAND Gate Bistable Multivibrator.
Applications
Bistable Multivibrators have many
applications such as frequency dividers,
counters or as a storage device in computer
memories but they are best used in circuits such
as Latches and Counters.
Monostable Multivibrator
Monostable - has only ONE stable state and is triggered
externally with it returning back to its first stable state
Monostable Multivibrators or "One-Shot" pulse generators are
used to generate a single output pulse, either "High" or "Low", when
a suitable external trigger signal or pulse T is applied.
Time constant is T = 0.8RC + Trigger in seconds
Monostable Multivibrator
NAND Gate Monostable Circuit.
Applications
Monostable multivibrators are used in a number of
applications and can be found wherever a square wave or
timed interval is necessary for the success of a system. For
example, monostable multivibrators were once used in analog
systems to control an output signal’s frequency, synchronize
the line and frame rate of television broadcasts, and even
moderate the tunes of different octaves with electronic
organs. Additionally, before the integrated circuit’s invention,
monostable multivibrators were connected together in a
series to divide frequencies.
Advantages
Monostable multivibrators generate output signals at
timed intervals in the form of square waves. They are
half the size of astable multivibrators and can,
therefore, be used in more diverse situations.
Monostable multivibrators can be connected to one
another to provide additional functionality. They are
relatively simple in design and are inexpensive when
compared with other types of oscillators.
Disadvantage
One main disadvantage of Monostable
Multivibrators is that the time between
the application of the next trigger pulse
T has to be greater than the RC time
constant of the circuit.
THANK
YOU

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Multivibrator and its types defination and usges.pptx

  • 1. Course Title- Digital Electronic & Pulse Technique Course Code- CSE-311 Presentation Topic - Multivibrators
  • 2. Presented By- MD Ali Jaker Department - Computer Science and Engineering Batch- 10th Semester- 5th ID- 220311024 Submitted To- Nigar Afsana Designation- Lecturer University of Creative Technology Chittagong
  • 3. • A MULTIVIBRATOR is an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip- flops. • It is characterized by two amplifying devices (transistors, electron tubes or other devices) • cross-coupled by resistors and capacitors. • It has two states low “0” & high “1” Multivibrator
  • 4. Basic types There are three types of multivibrator circuit • Astable Multivibrator • Monostable Multivibrator • Bistable Multivibrator
  • 5. Astable multivibrator Astable, in which the circuit is not stable in either state—it continuously oscillates from one state to the other. Due to this, it does not require an input (Clock pulse or other).
  • 6. Astable multivibrator NAND Gate Astable Multivibrators
  • 7. Applications Astable multivibrators are used in amateur radio equipment to receive and transmit radio signals. Astable multivibrators are also used in morse code generators, timers, and systems that require a square wave, including television broadcasts and analog circuits.
  • 8. Advantages Astable multivibrators continuously switch between one state and another. This allows astable multivibrators to power themselves and perform work at a consistent rate without influence from any outside forces or events. Additionally, astable multivibrators are inexpensive to produce, are relatively simple in design, and can remain functional for extraordinary amounts of time.
  • 9. Disadvantages Astable multivibrators do not transfer the entire output signal to the input. This is due to resistance within the circuit, lack of a completely closed loop at the output terminals, and the tendency for one capacitor or transistor to absorb energy at a slightly different rate than the other. Although the amplifier restores the lost energy when it amplifies the signal, the signal will eventually be too small to be of any use.
  • 10. Bistable Multivibrator Bistable Multivibrators circuit, both states are stable, and the circuit will remain in either state indefinitely. This type of Multivibrator circuit passes from one state to the other "Only" when a suitable external trigger pulse T is applied and to go through a full "SET- RESET" cycle two triggering pulses are required.
  • 11. Bistable Multivibrator NAND Gate Bistable Multivibrator.
  • 12. Applications Bistable Multivibrators have many applications such as frequency dividers, counters or as a storage device in computer memories but they are best used in circuits such as Latches and Counters.
  • 13. Monostable Multivibrator Monostable - has only ONE stable state and is triggered externally with it returning back to its first stable state Monostable Multivibrators or "One-Shot" pulse generators are used to generate a single output pulse, either "High" or "Low", when a suitable external trigger signal or pulse T is applied. Time constant is T = 0.8RC + Trigger in seconds
  • 14. Monostable Multivibrator NAND Gate Monostable Circuit.
  • 15. Applications Monostable multivibrators are used in a number of applications and can be found wherever a square wave or timed interval is necessary for the success of a system. For example, monostable multivibrators were once used in analog systems to control an output signal’s frequency, synchronize the line and frame rate of television broadcasts, and even moderate the tunes of different octaves with electronic organs. Additionally, before the integrated circuit’s invention, monostable multivibrators were connected together in a series to divide frequencies.
  • 16. Advantages Monostable multivibrators generate output signals at timed intervals in the form of square waves. They are half the size of astable multivibrators and can, therefore, be used in more diverse situations. Monostable multivibrators can be connected to one another to provide additional functionality. They are relatively simple in design and are inexpensive when compared with other types of oscillators.
  • 17. Disadvantage One main disadvantage of Monostable Multivibrators is that the time between the application of the next trigger pulse T has to be greater than the RC time constant of the circuit.