NCO NCO NCO phase accumulator NCO NCO numerically controlled oscillator numerically controlled oscillator NCO NCO NCO English numerically-controlled oscillator phase truncation NCO NCO NCO numerically controlled oscillators numerically controlled oscillator numerically controlled oscillator NCO other synthesis methods employing single-cycle waveforms NCO NCO NCO NCO phase accumulator NCO NCO NCO NCO NCO numerically controlled oscillator NCO Numerically Controlled Oscillator (NCO) numerically controlled oscillator Numerically Controlled Oscillator NCO NCO numerically controlled oscillators NCO NCO NCO Wikipedia