Systems and methods for passive radio enabled power gating for a body mountable device are disclosed. In one embodiment, a system for power gating includes: a power supply a Near Field Communication (NFC) antenna to receive NFC signals a Radio Frequency (RF) rectifier electrically coupled to the NFC antenna to generate a current based on a signal received from the NFC antenna and an electronic switch coupled between the power supply and a sensor, wherein the RF rectifier is further coupled to the switch to apply the current to the switch to change a state of the switch.本發明揭示用於一身體可安裝裝置之被動式無線電致能電源閘控之系統及方法。在一項實施例中,一種用於電源閘控之系統包含:一電力供應器;一近場通信(NFC)天線,其用以接收NFC信號;一射頻(RF)整流器,其電耦合至該NFC天線以基於從該NFC天線接收之一信號而產生一電流;及一電子開關,其耦合在該電力供應器與一感測器之間,其中該RF整流器進一步耦合至該開關以將該電流施加至該開關以改變該開關之一狀態。100‧‧‧系統101‧‧‧穿戴式裝置102‧‧‧處理器104‧‧‧記憶體106‧‧‧天線108‧‧‧感測器110‧‧‧電力供應器112‧‧‧開關114‧‧‧近場通信(NFC)天線116‧‧‧射頻(RF)整流器150‧‧‧被動式無線電閘控電力供應器
