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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.
 

thd op

u can run transient simulation and do fft
 

thd design architect ic

pfd001 said:
u can run transient simulation and do fft

Hi, pfd001

Can you or others expain it clearly?
 

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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