The design of a fully active on-chip wireless charging rectifier

• Main Author: Nor Fazlinda Binte Mohd Affandi
• Other Authors: Siek Liter
• Format: Final Year Project
• Language: English
• Published: 2016
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/67892
• Institution: Nanyang Technological University

This paper presents an efficiency-enhanced rectifier integrated for wireless power transfer system that will be utilized in wireless device applications. The design of the proposed rectifier is implemented in the 0.18µm CMOS technology. Cross-coupled connections are adopted to a pair of pMOS power transistors while the switching of a pair of nMOS power transistors are controlled by unbalanced-biased comparators to reduce the total voltage drop along the conducting path. Additionally, unidirectional flow of current to the load is constantly maintained. The designed unbalanced-biased comparators aims to minimize the reverse leakage current that will improve the rectifier power efficiency. The proposed rectifier generates a maximum load current of 100mA while achieving a VCE of 71.4% along with a PCE of at least 79% with a 1MHz input supply of 7 V amplitude.