PSRR filtering is becoming more and more difficult for engineers to incorporate into timing designs. In this post, we explain why this is, what PSSR is in the first place, and the best ways to avoid the dreaded "supply ripple". You'll have a strong understanding of the problems and solutions that arise from PSRR by the end of this post.
Noise Gets Rejected by Power Supply
How do you determine PSRR?
Wait a minute... What's this "ripple" you're talking about?
The RF Engineer's Dilemma
...Don't fix what's not broken
Stop the Design Madness!
Ok...it may be a little more complex than that.
- A ferrite bead
- A discrete SMD capacitor (Low Pass Filter)
- A linear regulator (used as a high pass filter)
let me explain...
So why is this a good thing?