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سؤال 442

What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital-to-analog converter, and a low-pass anti-alias filter?

  1. A direct digital synthesizerپاسخ درست
  2. A hybrid synthesizer
  3. A phase-locked loop synthesizer
  4. A direct conversion synthesizer

توضیح

A direct digital synthesizer steps a phase accumulator at the clock rate, converts each phase value into an amplitude with a lookup table, feeds the amplitudes to a digital-to-analog converter, and smooths the resulting staircase with a low-pass anti-alias filter.

ادامهٔ این آزمون

شروع تمرین
سؤال 442: What type of frequency synthesizer circuit uses a phase… · FCC Amateur Extra Class (Element 4) · Questena