Low cost wireless current sensor for NIALM application

New design of current sensor, including theoretical analysis and simulation, is presented. The performances of this new Rogowski coil sensor are measured and compared with a commercial product. Finally, a low power transmitter, based on a simple ramp Analog-to-Digital Converter architecture and a PWM-OOK modulation, is proposed and designed in 180 nm CMOS technology. The post-layout simulation exhibits a 1.8 mW power consumption for an output power of −10dBm.