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Analog Electronics

Analog Electronics
Large electric current flow of a BJT occurs

  in collector.
  in emitter.
  through emitter-collector
  in base.

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Analog Electronics
Feedback circuit in an oscillator can be accomplished by

 Capacitive coupling between input and output
 Inductive coupling between input and output
 Any one or combinations of the above methods
 Resistive coupling between input and output

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Analog Electronics
Darlington connection is achieved in 2 transistors by connecting

 both emitter.
 both collector.
 grounding both collector.
 both base.

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

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Analog Electronics
To prevent a DC return between source and load, it is necessary to use

Resistor between source and load
Either A or B
Capacitor between source and load
Inductor between source and load

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Analog Electronics
In CE configuration, the input V-I characteristics are drawn by taking

  VBE versus IE for constant value of VCE.
  VCE versus IC for constant value of IE.
  VBE versus IB for constant value of VCE.
  VBE versus IB for constant value of IC.

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