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How to properly measure PSRR for bandgap?

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surianova

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hi!

When i measure the PSRR for bandgap, shd i measure together with power supply filter? or just bandgap alone?
 

dhasmana

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PSRR for bandgap

If the power supply filter is being used in the system then it makes more sense to simulate the BGR PSRR with the filter.
 

lijianheng

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Re: PSRR for bandgap

It depends on how to define the PSRR of bandgap, only from circuit view or from the whole system view.
 

gafsos

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Re: PSRR for bandgap

.EXTRACT AC LABEL = PSRR_min FILE=PSRR.aex MAX(Vdb(VBG))
.EXTRACT AC LABEL = PSRR_dc FILE=PSRR.aex yval(Vdb(VBG),1)
.EXTRACT AC LABEL = PSRR_min_freq FILE=PSRR.aex XMAX(Vdb(VBG))
 

starrinesss

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PSRR for bandgap

Use the filter will be batter to reflact the practical situation.
 

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