A family of optically isolated differential probes has been created by Keysight Technologies to improve the effectiveness and performance testing of fast-switching devices, including wide bandgap GaN and SiC semiconductors. Along with Keysight’s MXR B and HD3 series oscilloscopes, the new voltage probes will be on show at the Applied Power Electronics Conference (APEC) 2025 in Keysight’s booth (#829).
Small differential signals riding on high common-mode voltages must be measured in order to validate floating half-bridge and full-bridge topologies, which are frequently used in power conversion, motor drives, and inverters.
Noise interference, safety issues, and variations in the voltage source in relation to ground can make this measurement difficult.
Because optically isolated differential probes are galvanically isolated and reject common-mode voltages, power electronics engineers can safely and precisely measure floating circuits in noisy, high-voltage settings. For high-voltage applications such as solar energy, battery management systems, electric vehicles (EVs), and more, this technology will propel advancements in efficiency and switching loss testing.
The isolated differential probes from Keysight are perfect for high-voltage, high-side tests because they offer up to 10 billion times more common-mode rejection than conventional differential probes.
With a bandwidth of up to 1 GHz and a differential voltage range of ±2,500 V, these probes provide precise examination of GaN and SiC devices that switch quickly.
Leadership Comments
Robert Saponas, Vice President and General Manager of Keysight’s Digital and Photonics Center of Excellence, said: “Keysight recognizes the future of power integrated circuits going beyond Moore’s law, and we are committed to equipping our customers with the best power testing technology for their next breakthrough. Introducing Keysight’s isolated probes expands our suite of power solutions that streamline our customer’s power integrity, supply, and efficiency testing workflow.”
Visit booth #829 at APEC to learn more about this new probing technology and other cutting-edge Keysight solutions, including power electronics modeling, device characterization, power integrity analysis, teaching labs, and power source emulation.
