From Andre Majorel Sent Sat, Sep 1st 2018, 18:20
On 2018-08-31 19:26 -0700, Brian Willoughby wrote: > 8-bit counter makes it digital, even though the DAC is cheap. Depends what makes a VCO digital. If it is having a DAC in the signal path, yes. If it is having its frequency controlled digitally, not necessarily. > A pure analog ramp oscillator still has a cap charging and > getting reset, so that?s 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). Agreed. > One step further away from a VCO than a DCO would be an > accurate characterization. Unless the clock that increments the counter is derived from a VCO, in which case it's arguably the opposite. -- André Majorel http://www.teaser.fr/~amajorel/