Mumbai University > Information Technology > Sem3 > Analog and Digital Circuits

Marks: 4M

Year: May 14

• Biasing is the process of applying external voltages to the transistor.

• A BJT is capable of operating in four different regions, depending on the biasing. The regions of operation are :

  I. Cutoff region

  II. Saturation region

  III. Active region

  IV. Inverse active region

• To operate the transistor in these regions the two junctions of a transistor should be forward or reverse biased according to the application.

• Factors to be considered to design a biasing circuit:

  I. Position o a Q point

  II. Value of IC at quiescent point

  III. Stability

  IV. Maximum output swing