Measuring PSRR


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Measuring PSRR
10106071031600 Measuring PSRRSimply stated, power supply rejection ratio (PSRR) is the magnitude of the input signal divided by the output signal. This can be a source of confusion as some manufacturers show PSRR as a positive log magnitude (input divided by output), while others show it as a negative log magnitude (output divided by input). In this book, we use the positive rejection ratio convention result, determined by the input divided by output. The input is an AC modulation signal superimposed on the power supply voltage. The output is the AC output signal of the device at the same modulation frequency.
Citation
Steven M. Sandler: Power Integrity: Measuring, Optimizing, and Troubleshooting Power Related Parameters in Electronics Systems. Measuring PSRR, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export