CMRR, PSRR, noise for circuits operating at DC condition?

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BillQ

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For the circuits which are only operating under DC condition(there is no AC small signal)

Should I characterize the CMRR, PSRR, noise of the circuits?

(Anyway, I think offset should be measured, slew rate also.

But I think noise only refers to the AC operation, normally CMRR; PSRR are also simulated by XF sweeping the frequency.
Just a litte confused)
:|
 

In the real world, there are no pure DC or AC signal condition. Noise is always present. CMRR, PSRR must be checked. Otherwise, you will have a lot of trouble.

A simple question, how can you sure you circuit only output DC signal
 

    BillQ

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