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Transistor Biasing

For any transistor amplifier circuit, the transistor must be biased properly and it has the following conditions:
 
  • The base-emitter junction must be forward biased. VBE = 0.7 V for silicon transistor and VBE = 0.3 V for germanium transistor.
  • The collector emitter junction must be reverse biased. VCE = 1 V for silicon transistor and VCE = 0.5 V for germanium transistor.
The following biasing arrangements are most commonly used in transistor circuits.
  1. Fixed bias
  2. Fixed bias with emitter feedback
  3. Fixed bias with collector feedback
  4. Voltage divider or self-bias
  5. Emitter bias




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