kumite
Junior Member level 1
hello,
i am designing tail bias LC VCO using tsmc13rf with supply voltage 1.2v and tail current 1.5mA @ center frequency =1.8G and iam using spiral inductors from tsmc13rf lib. and i have some questions:
1-when i did transient analysis i found that the single ended peak to peak voltage reach 1.7v !! (more than the supply voltage) is that normal ??
2-in DC analysis i found that the -ve res. transistors are in saturation ..is it necessary to be in triode ? and to verify that from Dc analysis ?
Any help would be appreciated .
Thanks in advance.
i am designing tail bias LC VCO using tsmc13rf with supply voltage 1.2v and tail current 1.5mA @ center frequency =1.8G and iam using spiral inductors from tsmc13rf lib. and i have some questions:
1-when i did transient analysis i found that the single ended peak to peak voltage reach 1.7v !! (more than the supply voltage) is that normal ??
2-in DC analysis i found that the -ve res. transistors are in saturation ..is it necessary to be in triode ? and to verify that from Dc analysis ?
Any help would be appreciated .
Thanks in advance.