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How to do THD simulation of fully differential op?

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shaq

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opamp thd simulation

Dear all,

How to do THD simulation of fully differential opamp in Hspice.

My circuit architecture is shown below.
 

pfd001

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thd op

u can run transient simulation and do fft
 

shaq

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thd design architect ic

pfd001 said:
u can run transient simulation and do fft

Hi, pfd001

Can you or others expain it clearly?
 

nagag

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In case of spectre you can do in this way.
Now this is in unity gain configuration and so you can run a transient with a large signal and then select THD option from the waveform viwer.There you need to specify the fundamental frequency.It will give you hormonic distortion interms of percentage.
 

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