aliqureshi436
Newbie level 2
Hi i am trying to design the differential ring oscillator at 3 GHz, pic is attached. So far what i have been able to do is to make it oscillate when the simulation time is 20nsecs, but whenever i increase simulation time the oscillator starts giving dc!
The other problem is that i have not been able to find widths for the pmos and nmos, i have tried almost every width (parametric analysis) but the circuit only oscillates at 1 specific relation of widths and i don't know weather there is a particular relation to find width or only way is hit and try!
Please help.