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.　©　2017　IEEE.