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Hassan Bevrani

Hassan Bevrani

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId: 55913436700
Faculty: Faculty of Engineering
Address: Dept. Of Electrical and Computer Eng, University of Kurdistan, Allameh Hamdi Blvd, Sanandaj PO Box 416, P. C: 66177-15175, Kurdistan, Iran
Phone: +98-87-33624001

Research

Title
An Inductor-Less AC/DC Converter Using a Bipolar Cockcroft-Walton Multilier and a Cross-Coupled Charge Pump
Type
Presentation
Keywords
inductor-less converters; Cockcroft-Walton circuit; charge pump; CMOS circuits
Year
2020
Researchers Akira Shibata ، Hassan Bevrani ، Qobad Shafiee ، Kei Eguchi

Abstract

For low-voltage vibration energy harvesting, such as 0.5V@50Hz input, this paper presents a novel inductor-less step-up ac/dc converter. In the proposed ac/dc converter, high voltage gain can be achieved by combing a cross-coupled charge pump with a bipolar Cockcroft-Walton multiplier, where a rectifier-less design is realized by the bipolar Cockcroft-Walton multiplier. Furthermore, small EMI (Electro-Magnetic Interference) is provided by the inductor-less design. The performance of the proposed ac/dc converter with 12× step-up gain is evalutaed by theoretical analysis and SPICE (Simulation Program with Integrated Circuit Emphasis) simulations. The SPICE simulations demonstrated that the power efficiency of the proposed converter is about 88%@1mW with 1% ripple factor. Furthermore, breadboard experiments verify the feasibility of the proposed inductor-less topology.