Electronics Fundamentals/Semi Conductor Devices/Transistor/Electronic DC Amplifier

Configuration

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Analysis

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Assume that the transistor is ideal.

 
 
 
 
 
 


When   or R1 = 0. The equation above is reduced to

 
R3 = 0 ,  
R3 = R4 ,  
R3 = 2R4 ,  
R3 = (n+1)4 ,  


When  . The equation above is reduced to

 

When R1 = 0 or R2 = 0,

  . Transistor operates like a closed switch

When R2 >> R1

  . Transistor operates like an opened switch

With the right biased voltage at the base, the transistor can be operated like a mechanical switch.