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Q: TAS5103 PSRR
Are there any documents showing the difference between an open loop device PSRR and a closed loop device PSRR? For example TAS5103 vs TAS5706?
A: Re: TAS5103 PSRR
I have attached a couple of files that will hopefully show the difference in PSRR between open loop and closed loop.
The file "PSRR Class D" is a document that specifically shows why PSRR in an open loop amp cannot be measured in the same way as a Class AB.
The file "PSRR.doc" has some plots of THD + N vs frequency of the TAS5103 with ripples at different frequencies. It also has the same plots for the TAS5706B (a closed loop device).
The file "slea049.pdf" is an app note that goes into detail on how ripple modulates with the switching frequency to create noise at the outputs.
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