No abstract

This paper presents the influence of metal sheet near the coils of inductively coupled wireless power delivery system. Experiments and electro-magnetic field simulation shows the influence of various kind of metal sheets and sheet positions on the power efficiency and peak frequency shift. The tradeoff between the power efficiency and shielding ability is also discussed.

No abstract

A single-inductor dual-output wireless power delivery system for small size battery-less NAND flash memory card is presented. The power delivery system uses two rectifiers connected to a single inductor which is synchronously switched by pseudo-random-sequence PWM signal with induced AC voltage. The power delivery system can generate 8 V and 16 V with peak efficiency of 40 % and maximum total transmitting power of 0.5 W. The test chips were designed and fabricated using 0.18um-CMOS with high-voltage LDMOS option.