Analog Electronics
CMOS devices use

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

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Analog Electronics
For transistor action

  the emitter should be heavily doped.
  Je must be forward biased and Jc should be reverse biased.
  all of these.
  the base region must be very thin and lightly doped.

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