Analog Electronics
Which of the following transistor configuration circuit is much less temperature dependent ?

None of these
  Common collector.
  Common emitter.
  Common base.

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Analog Electronics
Optocouplers combine

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

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