Metric · Analog, RF & Mixed-Signal
PSRR (Power Supply Rejection Ratio)
How much a change on the supply rail is attenuated at a circuit's output, in decibels, usually plotted against frequency. It falls with frequency, so a part with 80 dB at DC may offer almost none at switching-regulator ripple frequencies.
- Also known as
- Supply rejection, PSR
- Type
- Metric
- Domain
- Analog, RF & Mixed-Signal, Amplifiers
Notes
The usual reason a clean analog block misbehaves next to a noisy DC-DC converter on the same board.
Related terms
Part of the Analog, RF & Mixed-Signal glossary, with every term in the topic and the lifecycles, tools and standards that use them.
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