Low power and high receiving sensitivity wireless wake-up receiver with 2-stage power-supply control scheme for lithium-ion battery systems

A wireless wake-up receiver for lithium-ion battery systems was developed and evaluated. A 2-stage power-supply control scheme is added to the wake-up receiver for supporting low power, high receiving sensitivity, and short wake-up time simultaneously. When the battery system is in power-down mode, only a voltage detector in the wake-up receiver consumes a current while waiting for a wireless wake-up signal with low current and high receiving sensitivity. When the voltage detector detects the wake-up signal, all circuits in the wake-up receiver operate for detecting the wake-up signal with a short wake-up time. The wake-up receiver consumes only 0.3 μA of the power-down current for -32 dBm of the receiving sensitivity with 11 ms of the wake-up time.