ddis
Member level 2
Hi all,
i have to calculate the output power of VCO in cadence spectre. i am using pss & pnoise analysis. Actually the Collpitts I/Q VCO (4.8Ghz) is designed by another person.
I just know its specs. Its o/p swing is +0.75V to -0.75V. After doing the analysis i go to Results>Direct Plot>Main Form
it asks for the resistance value
Now i have a doubt here. The VCOs o/p is going to frequency divider so the output will see a capacitive load with a small resistance. So what value of resistance to use while calculating the output power.
I have attached the screenshot
i have to calculate the output power of VCO in cadence spectre. i am using pss & pnoise analysis. Actually the Collpitts I/Q VCO (4.8Ghz) is designed by another person.
I just know its specs. Its o/p swing is +0.75V to -0.75V. After doing the analysis i go to Results>Direct Plot>Main Form
it asks for the resistance value
Now i have a doubt here. The VCOs o/p is going to frequency divider so the output will see a capacitive load with a small resistance. So what value of resistance to use while calculating the output power.
I have attached the screenshot