A UHF micro-power CMOS rectifier using a novel diode connected CMOS transistor for micro-sensor and RFID applications

• Main Authors: Shokrani, Mohammad Reza, Hamidon, Mohd Nizar, Khoddam, Mojtaba, Najafi, Vali
• Format: Conference or Workshop Item
• Language: English
• Published: IEEE 2012
• Online Access: http://psasir.upm.edu.my/id/eprint/69667/1/A%20UHF%20micro-power%20CMOS%20rectifier%20using%20a%20novel%20diode%20connected%20CMOS%20transistor%20for%20micro-sensor%20and%20RFID%20applications.pdf; http://psasir.upm.edu.my/id/eprint/69667/
• Institution: Universiti Putra Malaysia

The design strategy and efficiency optimization of UHF micro-power rectifiers using a novel diode connected MOS transistor is presented. The proposed diode connected MOS transistor uses a new bulk connection which leads to reduce the threshold voltage and leakage current in compare to conventional diode connected transistors. Using the proposed diode in typical rectifiers makes a significant improvement in output voltage and current therefore the efficiency is increased comparing to the same rectifier architectures using conventional diodes. Also a design procedure for efficiency optimization is presented and a superposition method is used to optimize the performance of multiple output rectifiers. Finally a five stage double output rectifier is designed based on the proposed optimization method. Simulation results verified the improvement in efficiency and area. All circuits are designed in a standard 0.18um CMOS Technology.