PSPICE-FOR-TI: How to simulate Ripple Input and Output Correctly

What kind of error did you get? This is what I got:

Hi JC,

it supposed to look like this 

like when we did a test for Ripple voltage test 

but i don't know why the result like yours (i got the same result like you) 

Thank you 

Hi, is the blue waveform your input ripple? There's no equivalent found in the simulation so you cannot expect any output ripple.

-JC

Hi, 

that's the example from TI Document to test PSRR 

PSRR Measurement by TI.pdf

Hi Ihzany,

Please replace V2 with a VSIN in order to inject the noise voltage. The PDF says VAC but it means an time variant source, not the SPICE primitive VAC.

Thanks,
JC

Hi JC, 

the result only normal like this..  

it didn't show any ripple at all 

Thanks

Hi Ihzany,

Please zoom in.

-JC

Hi JC,

This is how far i can go 

Thanks

Your ripple is very small, please zoom in on one of the waveforms, not both.

You can also plot them on different plots:

-JC