High efficiency and high sensitivity DTMOS differential-drive rectifier for energy harvesting application

This paper discusses the efficiency (PCE) of 0.18 mu m CMOS dynamic threshold voltage (DTMOS) differential-drive rectifier (DDR) for energy harvesting application which can be improved by the use of decoupling capacitor between the cross-connected drain-and-gate transistors at the rectifier. The proposed design achieves 80.6% PCE at input power, P-in = -23.5dBm and produces an output of 503.1mV at input frequency, 900MHz and P-in(amplitude) = -12 dBm. The proposed design enables the rectifier operates in less than 3 times input RF power compared to conventional DTMOS DDR.