Analog Electronics
When the JFET is no longer able to control the current, this point is called the

  pinch-off region.
  saturated point.
  depletion region.
  breakdown region.

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Analog Electronics
Optocouplers combine

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

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