Analog Electronics
A Schottky diode is a

 both a majority and a minority carrier diode.
 fast recovery diode.
 minority carrier device.
 majority carrier device.

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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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