The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl Measurements >> Phase Noise and Jitter Measurements >> ring pll jitter calculation based on VCO tuning voltage ripple measurement https://designers-guide.org/forum/YaBB.pl?num=1463760661 Message started by mario on May 20th, 2016, 9:11am |
Title: ring pll jitter calculation based on VCO tuning voltage ripple measurement Post by mario on May 20th, 2016, 9:11am Can I estimate ring pll jitter by measuring ring VCO tuning voltage ripple? After measuring loop filter output voltage : Vtune average and Vtune peak voltages for locked PLL Calculation: VCO average freq = Fvco_av [Hz] = Vtune_av [V] * Kvco[Hz/V]; VCO average period =Tvco_av= 1/Fvco_av [s] VCO peak freq= Fvco_pk = Vtune_pk [V] * Kvco[Hz/V]; Jitter [s] = {(Fvco_pk - Fvco_av)/Fvco_av } * Tvco_av [s] Is the above correct estimation of ring pll jitter? Thank you |
The Designer's Guide Community Forum » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |