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Analog ElectronicsSmall-Signal Amplifiers

A bypass capacitor placed across an emitter resistor is intended mainly to?

  • AReduce AC emitter degeneration over its effective frequency range
  • BIncrease DC emitter resistance
  • CBlock all collector current
  • DCreate positive DC feedback
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Correct Answer: A. Reduce AC emitter degeneration over its effective frequency range
Explanation: The capacitor provides a low-impedance AC path around the emitter resistor while leaving the resistor available for DC bias stabilization.
Reference: Standard analog electronics: emitter bypass capacitor
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