Essentially, an EMI filter is an electrical device/circuit that will help mitigate the high-frequency electromagnetic noise present on the power lines as well as on signal lines (Fig. 3). 3.

What you’ll learn: Why a tunable GHz-range filter is needed. How a new approach to devices based on YIG and magnetic spin waves offers a much smaller and lower-power solution.

Second-stage output filters are often used to attenuate the output voltage ripple of a switching power supply. They can also isolate one load circuit from another. In this power tip, I will describe ...