[IBIS-Users] Calculation of C_comp

Hello,
   
  I am trying to calculate C-comp using LC oscillator method for output pad. For that i am disabling both NMOS and PMOS from the core side and then doing AC Analysis taking (for supply of 5v)
  dc 2.5 ac 2.5 
  so i can't understand that
  1.   the capacitance that i am calculating using the approach, isn't it that for a signal applied some capacitances are charged up and some are discharged. so how can we say that we have approximate value of capacitance i.e. C_comp.
  2.   i should try to obtain capacitance also by enabling either PMOS or NMOS too.
   
  Thanking you
   
  Regards
  Bhavneet singh

 			
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