EMC Question of the Week: May 6, 2024
Suppose the radiated emissions from a product are proportional to the common-mode current on its power cable. Suppose the common-mode current on the cable is proportional to the time-rate-of-change of the voltage (dV/dt) on a power converter heatsink. When the power converter switches at 1 MHz, the radiated emissions at 33 MHz are 40 dB(μV/m). What would we expect the radiated emissions at 33 MHz to be if the same power converter switches at 3 MHz?
- much lower
- about the same
- 3 dB higher
- 10 dB higher