[sdiy] Triangle wave DCOs?

[mark verbos]

On Jan 17, 2009, at 3:28 PM, Tom Wiltshire wrote:

> I don't understand how you're going to get any asymmetry if it's  
> being switched by a microprocessor. The one thing you can be damn  
> sure of is that the time going up and the time going down are the  
> same. Assuming you don't change the current, that'll guarantee the  
> symmetry, won't it? The amplitude compensation is still a problem,  
> but that's the same for ramp DCOs, and isn't that hard to solve.
>
> Still, like Aaron, I can't see any particular advantage over a ramp- 
> reset DCO.


One advantage of triangle cores in general is that the triangle and  
sine purity is better. No glitch. Saw can be made simply by sending  
the square to an analog switch->inverter and mixing the original and  
the inverted/switched one together.

Mark