Analog Electronics
Optocouplers combine

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

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Analog Electronics
Why is silicon preferred than germanium ?

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

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