Analog Electronics
CMOS devices use

  complementary E - MOSFETs.
  bipolar transistors .
  DMOS devices.
  class A operation.

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Analog Electronics
In all base driver amplifiers

ac collector voltage is 180° out of phase with ac base voltage
ac collector voltage is in phase with ac base voltage
None of these
ac emitter voltage is 180° out of phase with ac base voltage

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