Extra exam question E7B03
Subelement E7, PRACTICAL CIRCUITS· Group E7B
What circuit is required at the output of an RF switching amplifier?
- A.A filter to remove harmonic content (correct answer)
- B.A high-pass filter to compensate for low gain at low frequencies
- C.A matched load resistor to prevent damage by switching transients
- D.A temperature compensating load resistor to improve linearity
WhyA filter to remove harmonic content is required at the output of an RF switching amplifier. An RF switching amplifier's output is rich in harmonic content because of its switching action, so a filter is required at its output specifically to remove that harmonic energy before the signal reaches the antenna, answer A. A high-pass filter to boost low-frequency gain, a matched load resistor for switching transients, and a temperature-compensating load resistor aren't the actual purpose of this required output filtering.
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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