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Analog Electronics

Analog Electronics
In a CB amplifier the maximum efficiency could be

25%
50%
85%
99%

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Analog Electronics
If the base resistor is very small, the transistor will operate in the

 active region.
 cutoff region.
  saturation region.
All of these

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Analog Electronics
A common - mode signal is applied to

  the top of the tail resistor.
  the non - inverting input.
  the inverting input.
  both inputs.

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Analog Electronics
Depending upon the switching recovery time and on state drop, the power diodes are types

 General purpose, fast recovery.
  General purpose, fast recovery and schottly.
 None of these.
 Fast recovery, Schottky.

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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 = 1.33 x 1012 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

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Analog Electronics
Electron mobility is defined as

 the movement of electrons
 Drift velocity per unit field
None of these
 Diffusion velocity per unit field

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