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How does the alternating load line differ from the direct one?

  • A.It reflects the load seen only by the signal
  • B.It has the same slope but a different intercept
  • C.It is always steeper because the supply is higher
  • D.It passes through the origin rather than the supply

Answer: A

The signal sees any coupled load in parallel with the collector resistor and any bypassed emitter resistor as a short, so its load line is steeper and pivots about the quiescent point. Same slope with a shifted intercept describes a change of supply. It does not pass through the origin. Two load lines through one operating point, one for direct conditions and one for the signal, is the standard picture, and the swing available is read from the steeper one.

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