Extra exam question E7H01
Subelement E7, PRACTICAL CIRCUITS· Group E7H
E7H01
What are three common oscillator circuits?
- A.Taft, Pierce, and negative feedback
- B.Pierce, Fenner, and Beane
- C.Taft, Hartley, and Pierce
- D.Colpitts, Hartley, and Pierce (correct answer)
WhyColpitts, Hartley, and Pierce are three common oscillator circuits. Colpitts, Hartley, and Pierce are three of the most common oscillator circuit topologies used in radio equipment, each distinguished by how it derives the positive feedback needed to sustain oscillation, answer D. "Taft," "Fenner," and "Beane" aren't real oscillator circuit names.
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.