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Analog Electronics

Analog Electronics
Example of donor atom is

 Germinium
 Both A and B
 Silicon
 Antimony

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Analog Electronics
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are

fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz
fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz
fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz
fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz

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Analog Electronics
In n type semiconductor elements of which group of periodic table is added as dopant

 group 2.
 group 3.
 group 4.
 group 5.

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Analog Electronics
Which of the following amplifier circuit using junction transistor has the best gain?

Common base
All have the same gain
Common collector
Common emitter

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Analog Electronics
A transistor series voltage regulator is called emitter follower regulator because the emitter of the pass transistor follows the ________________________ voltage.

  base.
  collector.
  input.
  output.

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Analog Electronics
Which is the conversion of current done by diode ?

 DC to DC
None of these
 AC to DC
 DC to AC

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