OPERATIONAL AMPLIFIER


    OPERATIONAL AMPLIFIER

  •   IT IS A HIGH GAIN DEVICE
  •   IT AMPLIFIES THE ELECTRONIC VOLTAGE APPLIED TO THE INPUT
  •   OP AMP MAINLY HAVE TWO INPUTS
  •   INVERTING TERMINAL AND NON INVERTING TERMINAL
  •   IT IS ACTUALLY ONE TYPE OF DIFFERENTIAL AMPLIFIER
  •   INSTRUMENTATION AMPLIFIER, ISOLATION AMPLIFIER ARE OTHER TYPES.
  •   OP AMP IS AVAILABLE IN IC FORM
  •   IT MAINLY HAVE 8 TERMINALS
  •   IT HAS IDEAL AND NON IDEAL CHARACTERISTICS.
  •   OP AMP CHARACTERISTICS INCLUDES,
·         FINITE GAIN
·         FINITE INPUT IMPEDANCE
·         NON ZERO OUTPUT IMPEDANCE
·         INPUT CURRENT
·         INPUT OFFSET VOLTAGE
·         Common mode gain
·         Power supply rejection ect.
Using op amp we can make the following circuits
1.       Differential amplifier
2.       Voltage amplifier
3.       Biasing circuits
4.       Instrumentation amplifier
5.       Square wave generator
6.       Adder circuits
7.       Sub-tractor
circuits.

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