From Brian Willoughby Sent Sat, Sep 1st 2018, 02:24
8-bit counter makes it digital, even though the DAC is cheap. A pure analog ramp oscillator still has a cap charging and getting = reset, so that=92s not exclusive to DCO. The difference between a DCO = and VCO is that the DCO resets based on a digital crystal oscillator = that has been divided down, while a VCO resets based on an analog = voltage crossing an analog threshold (think: comparator). I would predict that an 8-bit digital ramp/saw would have lots of = aliasing and quantization noise. I=92ve never heard the Synthex in = person, but it has a reputation for being harsh and loud, or at least = very rich. Seems consistent. One step further away from a VCO than a DCO would be an accurate = characterization. Brian On Aug 31, 2018, at 7:26 AM, Bob Grieb <xxxxxxxx@xxxxxxx.xxx> wrote: > Are not even DCO, but instead use an 8-bit counter and resistor DAC to > generate a ramp/saw waveform. So there is no cap charging and = getting reset > as in a DCO. One step further away from a VCO, but I don't remember = hearing > anyone complain about how they sound. >=20 > Bob