Analog Electronics
Which of the following statements is false?

Push pull signals are equal and opposite in phase
All of these
A push pull output transformer has a centre-tapped primary
Class AB operation cannot be used for a push pull audio power output phase

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Analog Electronics
Optocouplers combine

 SITs and BJTs.
 IGBTs and MOSFETs.
 Power transistor and silicon transistor.
  Infrared light emitting diode and a silicon photo transistor.

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Analog Electronics
Why is silicon preferred than germanium ?

 Leakage current due to minority charge carrier is less in silicon
 Current sensitivity of silicon with temperature is less
 Silicon has higher tolerance to temperature
 All the above

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