BJT Biasing Revisited

  • Suhash Chandra Dutta Roy

The familiar four resistor circuit for biasing a bipolar junction transistor (BJT) is generalized through simple reasoning, and transformed to yield a different topology. Three alternative four resistor circuits are derived as special cases of the transformed generalized circuit, which do not appear to have been widely known in the literature. A detailed and careful analysis reveals that the bias stability parameters of all alternative circuits are comparable to those of the conventional circuit. An illustrative example is included for demonstrating this fact.


BJT Biasing Bias stability Design 


  1. 1.
    J. Millman, A. Grabel, Microelectronics (McGraw-Hill, New York, 1987)Google Scholar
  2. 2.
    S.G. Burns, P.R. Bond, Principles of Electronic Circuits (West Publishing House, St Paul, 1987)Google Scholar
  3. 3.
    A.S. Sedra, K.C. Smith, Microelectronic Circuits (Oxford University Press, New York, 1998)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of Electrical EngineeringIndian Institute of Technology DelhiNew DelhiIndia

Personalised recommendations