A Sub-100μW 2GHz OOK PA for IoT Applications

An ultra-low power (ULP) sub-100μW OOK power amplifier (PA) for Internet of Things (IoT) applications is developed. The PA features dual supply voltages, an optimized inverter-based driver with small conduction angle, and a Class-C output stage to drive 50Ω load with high efficiency. Measurements show the 65nm CMOS PA delivers −22.4dBm output power with 11% drain efficiency (DE) at 2GHz, which is one of the most efficient 2GHz PA for ULP applications.