Validate parasitics model

[mjungo]

Validate parasitics modelling approach consisting in

• defining a simple parasitics circuit (Cp, Rm, Ca, Ra) (NB. the model could easily be extended with additional parasitics elements, such as bond wire resistance and inductance)
• deriving the frequency response of that circuit Hp(f)
• transforming the ideal drive current signal to the frequency domain through FFT
• applying the parasitics filter to the signal by multiplication in the frequency domain
• converting the filtered signal back to the time domain through IFFT
• running a standard simulation with the filtered time-domain drive current signal as input
• evaluating the frequency response of the system as the addition (in dB) of the intrinsic response and the parasitics response