Advanced Qualification · A-002 Advanced components and circuits · A-002-011-002

What factor determines the bandwidth and response shape of a crystal lattice filter?

1. A The relative frequencies of the individual crystals
2. B The centre frequency chosen for the filter
3. C The gain of the RF stage following the filter
4. D The amplitude of the signals passing through the filter

Correct answer: A — The relative frequencies of the individual crystals. From the official ISED question bank, verified word for word.

Why

A crystal lattice filter uses several crystals wired together, and the spacing between their individual resonant frequencies directly shapes how wide the passband is and how the signal rolls off at the edges. The full explanation — and one for every question — is in Pro.

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Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.

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