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Important Questions for "Oscillations":

[1]

  1. Derive the Barkhausen criterion for sustained oscillations.
  2. Explain the depletion layer in p-n junction diode with suitable diagram.
  3. What is MOSFET? Explain the construction and working of depletion type and enhancement type of MOSFET with their respective characteristic curves.

[2]

  1. Derive the Barkhausen criterion for sustained oscillations.
  2. Calculate the barrier capacitance of p-n junction diode made of Germanium having area 1 um and thickness 100 nm. The dielectric constant of Germanium is 16.
  3. Find out the expression for input impedance, output impedance, current gain, voltage gain and power gain in terms of h-parameters for CE amplifier.

[3]

  1. Derive the Barkhausen criterion for sustained oscillations.
  2. Write a short note on emitter follower circuit.
  3. What is Boolean Algebra? Write down its commutative, associative and distributive properties.

[4]

  1. Barkhausen criterion for sustained oscillations states that A=1.
  2. The load regulation of IC 723 is 0.03%.
  3. The resistivity of pure germanium under standard conditions is about 60 ohm-cm.

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