Hi all,
Quote:If power consumption is not an issue, just scale up the V-I converter
thanks, but yeah that's the first thing I tried. I found that the current I needed would make the V-I converter more power hungry than the VCO itself. And not only that, the current would have to actually be divided down before the noise from the V-I converter was no longer dominant. I'm now trying out using varactors instead of the fancy V-I converter. It seems the noise is better.
Quote:did you do an E2E noise analysis of just the V to I converter and optimize that for noise?
well I just looked at the noise summary from the pnoise analysis in spectre and tried to minimize the largest contributors. But I guess its not fool proof because the noise summary seems to plot output noise and not phase noise.
thanks,
Aaron