PSpice Modelling - .noise simulations for resistors

For a resistor flicker noise cannot be modeled. However you can calculate total noise by a resistor using NTOT(device_name). For example if your resistor is R1.

You can add a trace in probe window as  NTOT(R1). 

Ok, I understand. I have another question. If I have the mathematical expression for the voltage spectral density of the flicker noise of a component, namely: en = 2.58e-6/sqrt(f), where f is the frequency. How can I model the flicker noise using ABM blocks in order to access the .NOISE Simulation? Thank you for your disponibility! . 

Using ABM blocks you may not be able to achieve .NOISE simulation as ABM would just evaluate the transfer function/ expression and deliver the output. If you want to see flicker noise of GaAsFET, diode, JFET, MOSFET, BJT models, these can be calculated NFID(device_name),
NFIB(device_name) in a AC simulation.

Using ABM blocks you may not be able to achieve .NOISE simulation as ABM would just evaluate the transfer function/ expression and deliver the output. If you want to see flicker noise of GaAsFET, diode, JFET, MOSFET, BJT models, these can be calculated NFID(device_name),
NFIB(device_name) in a AC simulation.

Thanks for your suggestion. But in my case, I want to make the PSpice model for a sensor where I know the transfer function and its intrinsic noise. Both are experimentally measured and with these data I want to implement the PSpice model for this sensor. The transfer function was made using ABM blocks, but I don`t know to implement the noise model in order to access the .NOISE Simulation. Do you have a suggestion in this case? Thank you! 

You would not be able to simulate intrinsic noise using a ABM block. Noise analysis is not considered for ABM.