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Analog ElectronicsMultistage Amplifiers

In a multistage RC-coupled amplifier, the coupling capacitor between stages primarily?

  • APasses AC while blocking the DC bias of one stage from disturbing the next
  • BPasses only DC
  • CProvides transistor heat sinking
  • DCreates a current mirror
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Correct Answer: A. Passes AC while blocking the DC bias of one stage from disturbing the next
Explanation: RC coupling transfers the signal while isolating the DC operating points of adjacent amplifier stages.
Reference: Standard analog electronics: RC coupling
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