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An IGBT's gate is driven by

  • A.a short current pulse that latches the device on
  • B.the main circuit voltage without any separate drive
  • C.a voltage, drawing current only while switching
  • D.a continuous current for as long as the device conducts

Answer: C

Being a field-controlled device, it needs charge to be moved into and out of its gate capacitance and nothing in between. That makes the drive circuit simple and its power requirement proportional to the switching frequency.

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