Extra exam question E6B06
Subelement E6, CIRCUIT COMPONENTS· Group E6B
Which of the following is a common use of a Schottky diode?
- A.In oscillator circuits as the negative resistance element
- B.As a variable capacitance in an automatic frequency control circuit
- C.In power supplies as a constant voltage reference
- D.As a VHF/UHF mixer or detector (correct answer)
WhyA common use for a Schottky diode is as a VHF/UHF mixer or detector. Schottky diodes switch extremely fast and have low junction capacitance, making them a common choice as a mixer or detector diode at VHF and UHF, where ordinary PN junction diodes can't keep up, answer D. They aren't used as a negative-resistance oscillator element, as a variable-capacitance AFC element (that's a varactor's job), or as a constant-voltage reference (that's a Zener's job).
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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