Welcome Your IET account
Sponsored whitepaper

Power supply rejection ratio measurements (PSRR)

CPD 1 hour logo

This activity can contribute towards your Continuing Professional Development (CPD) as part of the IET's CPD monitoring scheme

Power supply design engineers often face the challenge of measuring the power supply rejection ratio or power supply ripple rejection (PSRR) of their design.

The PSRR is an important parameter to indicate the power supply’s output stability. It provides information about the influence of input voltage variations on the stability of the output voltage. Easily and quickly analyze low frequency response on your oscilloscope with the R&S®RTx-K36 frequency response analysis (Bode plot) option. Characterize the frequency response of a variety of electronics, including passive filters and amplifier circuits. Learn more in our AppCard.

Easily and quickly analyse low frequency response on your oscilloscope with the R&S®RTx-K36 frequency response analysis (Bode plot) option. Characterize the frequency response of a variety of electronics, including passive filters and amplifier circuits. Learn more in our AppCard.

Key findings you will learn from reading this paper include:

  • how important PSRR is to indicate the power supply's output stability
  • how a PSRR can be measured by applying a sinusoidal ripple to the supply voltage
  • how an oscilloscope and the probes from Rohde & Schwarz can help with the measurement task

Sign up to the E&T News e-mail to get great stories like this delivered to your inbox every day.

Recent articles

Info Message

We use cookies to give you the best online experience. Please let us know if you agree to all of these cookies.


Learn more about IET cookies and how to control them