Sigma-delta modulator with near infrared charging for IOT wireless power transfer application

The proposed sigma-delta (ΣΔ) modulator of near infrared charging with Bluetooth antenna of wake-up receiver is presented for internet of things (IoT) wireless charging application. Continuous-time quadrature bandpass sigma-delta modulator control strategy has been adopted in state-of-the-art wireless power transfer (WPT) applications to meet power demand with the highest efficiency against coupling and load variations. The multi-charging modulator has built in near-infrared laser-driven (NIRLD) might be a promising wireless electrical power source.