I've measured the delay by trig and targ and inversed to derive Fvco
and sweep the difference voltage in .tran
but I cannot find the measure type in awave
how to write the netlist for the differential control voltage sweep in .tran?
........
.param vcm=0.9
Vctlp VCP 0 dc='vcm + 0.5*vdif'
Vctlm VCM 0 dc='vcm - 0.5*vdif'
.......
.tran 100ps 10us start=0us UIC
+ sweep vdif lin 9 -0.4 0.4
.meas tran tvco trig v(CKP) val='supply*0.8' td=0.1us rise=100
+ targ v(CKP) val='supply*0.8' td=0.1us rise=111
.meas tran fvco param=('10/tvco')
what's wrong ?
Thanks!