In small-signal models, what does the term 'r_pi' represent?

Practice Questions

Q1
In small-signal models, what does the term 'r_pi' represent?
  1. The input resistance of a BJT
  2. The output resistance of a BJT
  3. The transconductance of a BJT
  4. The thermal voltage

Questions & Step-by-Step Solutions

In small-signal models, what does the term 'r_pi' represent?
  • Step 1: Understand that 'r_pi' is a term used in small-signal models of transistors.
  • Step 2: Recognize that 'r_pi' specifically refers to the input resistance of a Bipolar Junction Transistor (BJT).
  • Step 3: Know that input resistance is important because it affects how much signal the transistor can take in.
  • Step 4: Realize that analyzing 'r_pi' helps in designing and understanding amplifier circuits.
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