What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital-to-analog converter, and a low-pass anti-alias filter?
A direct digital synthesizer✓Correct answer
A hybrid synthesizer
A phase-locked loop synthesizer
A direct conversion synthesizer
Explanation
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.