The demand for smaller, lighter, and more efficient AC/DC USB power delivery (PD) chargers is always a challenge for power-supply design engineers. Below 100 W, the quasi-resonant flyback is still the ...

Famously, Nikola Tesla won the War of the Currents in the early days of electrification because his AC system could use transformers to minimize losses for long distance circuits. That was well before ...

In an initial test, this circuit was able to efficiently convert AC currents into DC signals at liquid helium temperatures (e.g., those attained using closed-cycle refrigeration techniques). Discover ...