Articles Tagged with ''Power Integrity''

In high-speed circuit designs, power integrity (PI) and electromagnetic interference (EMI) are connected together. When the edge of the cavity created by power (PWR) and ground (GND) planes in PCBs radiates, the peak frequencies in the emissions are the same as the peak frequencies in the cavity self-impedance.

The power electronics engineer and the power integrity engineer share a common goal: provide the system with the correct voltages, currents, and noise characteristics to achieve the desired performance. Unfortunately, they do not share much else. They generally use different tools, vocabulary, and figures of merit. As a result, both sides lose.

SIJ talked with Martin Stumpf about industry trends, how to foster innovation, and what today’s designers need most from their test equipment.

Accurate ripple and noise measurements on power rails require a high-bandwidth oscilloscope and a dedicated probe to perform low-noise measurements and provide the offset capability to zoom in on top of the DC voltage. The R&S^®RT-ZPR20 power rail probe as well as the R&S^®RTE and the R&S^®RTO digital oscilloscopes are excellent tools for this measurements.