VCO

[Grant Richter]

> 
> Grant Richter wrote:
> > The VCO's in the phase locked loop IC's (CD4049, 74ACT4049) work very
well
> 
> Hmm,,to my mind the 4049 is a hex inverter, but I do belive you ment the
> 4046.

Oops - Brainfart - Yes I was talking about the 4046 and the high speed part
I tested was the 74HCT4046 not the A series although those should be faster
yet.

> 
> Yes, the linearity are no good in the 4046 and to all of you thinking of
> implement this kind of design to drive a wave table, should take a close
> look at the shematics of an OSCar.And also have a close listen to the
> sound when rapidly switching from a low note to a high and vice versa.
> You are then discovering one of the drawbacks of this kind of PLL/OSC
> implementation.
> 
Could you elaborate on that? I don't have the schematics for the OSCar. How
does it use a phase locked loop?

Thanks