DAC , DC and AC impedance ?

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mitgrace

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Dear All :

Does anyone know how to simulate the DC and AC impedance usihng Hspice or Spectre , Any document for me reference ?

Thanks
 

confused. What kind of impedance do you want to measure?
 

Dear Sir :

Added after 1 minutes:

Dear Sir :

I want to measure the current steering DAC , Curent cell , DC and AC impedance . Thanks
 

Ok, Then you get the impedance by apply a ac current source at the node you want. Measure its ac voltage, then you get the impedance.
 

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