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Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used

Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used Correct Answer both in region I and III

CONCEPT:

   TRANSISTOR:

  • An electronic device made using semiconductor material like Si
  • Transistors are used to amplify the electronic signals 
  • Transistor can be also operated as a switch 

   TRANSFER CHARACTERISTICS :

  •  These characteristics show the behavior of an electronic device.
  •  Transfercharctersitics can be drawn between input and output variables. 
  •  Output Voltage transfer characteristic  is  plotted V0 against  Vi
  •  A transistor can be used as a switch in the cutoff region  

   EXPLANATION:

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  • When a transistor works as a switch it works in cut-off and saturation regions.
  • In the cut-off state, both emitter-base junction and collector-base junctions are reverse biased.
  • But in the saturation region, both junctions are forward biased.
  • Thus, the region I & III  will be the two regions where we can operate a transistor as a switch. Therefore option 3 is correct.               

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