期刊
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
卷 69, 期 11, 页码 4334-4338出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2022.3190391
关键词
Rectifiers; Delays; Semiconductor device measurement; Voltage measurement; Power demand; Power transistors; Transistors; Active rectifier; delay compensation; 4068 MHz; wireless power transfer; inverter-based; conduction-time generator
资金
- National Key Research and Development Program of China [2018YFA0701400]
- National Natural Science Foundation of China [61974135]
This paper presents a 40.68 MHz active rectifier with a near-zero-quiescent-current inverter-based conduction-time generator for wirelessly powered implantable devices. The proposed scheme achieves near-optimum switching operation with high power conversion efficiency even at very high frequency. The active rectifier is fabricated in a standard 0.18 μm CMOS process and achieves high efficiency throughout the input range.
This brief presents a 40.68-MHz active rectifier with a near-zero-quiescent-current inverter-based conduction-time generator for wirelessly powered implantable devices. By using the proposed scheme, the rectifier achieves near-optimum switching operation with negligible turn-on and -off delays and thus high power conversion efficiency even at very high frequency such as 40.68 MHz. The active rectifier was fabricated in a standard 0.18 mu m CMOS process. With a 500-Omega load resistor, the measured power conversion efficiency is higher than 87% through the whole input range of 1.2 V to 1.8 V, and a peak efficiency of 93.3% is achieved with 1.2 V input amplitude.
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