The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl Measurements >> Phase Noise and Jitter Measurements >> PSS converg. error on adding capacitor unit to cap-bank in Ring oscillator https://designers-guide.org/forum/YaBB.pl?num=1488863914 Message started by subtr on Mar 6th, 2017, 9:18pm |
Title: PSS converg. error on adding capacitor unit to cap-bank in Ring oscillator Post by subtr on Mar 6th, 2017, 9:18pm I have a pseudo differential ring oscillator (where there are two ring oscillators with coupling creating a differential output) in the output of which I have a few capacitor banks to change frequency. If I had just connected 3 LSB banks, I see no issue with convergence. But the moment I add the next bits corresponding the higher cap values, I see that the pss does not converge. Anyone has faced any similar error where a unit in capacitor bank caused a pss convergence failure. |
Title: Re: PSS converg. error on adding capacitor unit to cap-bank in Ring oscillator Post by Ken Kundert on Mar 8th, 2017, 9:51am Are you sure the two oscillators are oscillating as one? Are the waveforms truely periodic? -Ken |
The Designer's Guide Community Forum » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |