analogdesigncdac
Junior Member level 2
Hai,
I am simulating active inductor VCO with free running frequency of 5GHz in 65nm technology.
using transient analysis (enabled transient noise) the measurement of period jitter is 400ps
In tran analysis the noise setttings, noiseseed 1, noisefmax 2.5G and didn't set noisefmin
Using pnoise analysis in jitter mode(at IMHz offset phase noise -75dBC/HZ) i am getting JC is 125fs & for different K values JCC (K=1) is 156fs and JCC(K=100) is 2.2ps, JCC(K=15000) is 88.2ps
PSS (number of harmonics 10)
PNOISE(number of sidebands 10)
1) Which of them is the right method.
2) For jitter measuremnet which parameter i have to take JC or JCC
2) For given frequency 5 GHz what must be the value of K i have to choose to measure the jitter.
3) how to interpret phase noise of -75dBC/Hz in terms of jitter
thank you
satya
I am simulating active inductor VCO with free running frequency of 5GHz in 65nm technology.
using transient analysis (enabled transient noise) the measurement of period jitter is 400ps
In tran analysis the noise setttings, noiseseed 1, noisefmax 2.5G and didn't set noisefmin
Using pnoise analysis in jitter mode(at IMHz offset phase noise -75dBC/HZ) i am getting JC is 125fs & for different K values JCC (K=1) is 156fs and JCC(K=100) is 2.2ps, JCC(K=15000) is 88.2ps
PSS (number of harmonics 10)
PNOISE(number of sidebands 10)
1) Which of them is the right method.
2) For jitter measuremnet which parameter i have to take JC or JCC
2) For given frequency 5 GHz what must be the value of K i have to choose to measure the jitter.
3) how to interpret phase noise of -75dBC/Hz in terms of jitter
thank you
satya
