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Electronic Devices & CircuitsSpecial Diodes

At radio frequencies, a forward-biased PIN diode is often used approximately as a?

  • ACurrent-controlled RF resistance
  • BZener reference only
  • CLight source only
  • DNegative capacitor only
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Correct Answer: A. Current-controlled RF resistance
Explanation: Stored charge in the intrinsic region makes a forward-biased PIN diode behave approximately as a controllable low RF resistance, useful in RF switches and attenuators.
Reference: Standard electronics: PIN diode RF application
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