Single-stage dual-output AC-DC converter for wireless power transmission

Xue, Zhongming; Fan, Shiquan; Zhang, Lina; Guo, Zhuoqi; Li, Dong; Li, Dan; Li, Geng

doi:10.1109/cicc.2018.8357023

Cited by 24 publications

(14 citation statements)

References 5 publications

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“…The authors in [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ] presented several novel circuit techniques to improve conversion efficiency of the rectification for MHz-range coupling. A design including both voltage- and current-mode operation covering a wide range of coupling ratios between the coils is proposed in [ 34 ].…”

Section: Ac-dc Conversion Circuit Architecturementioning

confidence: 99%

“…A design including both voltage- and current-mode operation covering a wide range of coupling ratios between the coils is proposed in [ 34 ]. The so-called dual-loop adaptive delay compensation, voltage mode switched offset comparator, single-stage regulating, dynamically controllable comparator, adaptive delay time control, and single-stage AC-DC converter techniques have been proposed to achieve better active rectification operating at 13.56 MHz [ 36 , 37 , 38 , 39 , 40 , 41 ]. In [ 44 ], an integrated resonant regulating rectifier has been presented for 144-MHz RF inputs ranging from 0.98 to 1.5 V, where rectification and regulation is combined in a single stage.…”

Section: Ac-dc Conversion Circuit Architecturementioning

confidence: 99%

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IC-Based Rectification Circuit Techniques for Biomedical Energy-Harvesting Applications

Gong

2022

Micromachines

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Energy harvesting can be achieved through many different mechanisms. Such technology has been drawing researchers’ attention to its practical applications for a decade, as it can be widely applied to countless scenarios. It steals the show in the modern development of the biomedical electronics, especially implantable applications, as it allows the patients to move freely without restriction. To prolong lifetime of the battery inside/outside a patient’s body, the electrical conversion efficiency of the electronic implant is of primary importance in energy harvesting. The conversion can be achieved by a so-called miniaturized rectification circuit (also known as “rectifier”). This study aims to compare different state-of-the-art techniques focusing on the conversion efficiency of the rectification. Particular emphasis is put on semiconductor-based circuits capable of being integrated with tiny chips on the implants.

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Section: Ac-dc Conversion Circuit Architecturementioning

confidence: 99%

Section: Ac-dc Conversion Circuit Architecturementioning

confidence: 99%

IC-Based Rectification Circuit Techniques for Biomedical Energy-Harvesting Applications

Gong

2022

Micromachines

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“…A maximum total output power of 40.5 mW can be delivered with a PCE of 82.3%. [8] TCSI 2019 [9] TBCAS 2019 [7] TBCAS 2020 [10] This…”

Section: B Three Stage Adiabatic Charge Pumpmentioning

confidence: 99%

Dual Output Regulating Rectifier for an Implantable Neural Interface

Almarri

Jiang

Demosthenous

2021

2021 28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS)

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This paper presents the design of a power management circuit consisting of a dual output regulating rectifier configuration featuring pulse width modulation (PWM) and pulse frequency modulation (PFM) to control the regulated output of 1.8 V, and 3.3 V from a single input ac voltage. The PFM control feedback consists of feedback-driven regulation to adjust the driving frequency of the power transistors through the buffers in the active rectifier. The PWM mode control provides a feedback loop to accurately adjust the conduction duration. The design also includes an adiabatic charge pump (CP) to power stimulators in an implantable neural interface. The adiabatic CP consists of latch up and power saving topologies to enhance its energy efficiency. Simulation results show that the dual regulating rectifier has a voltage conversion efficiency 94.3% with an ac input magnitude of 3.5 Vp. The power transfer efficiency of the regulated 3.3 V output voltage is 82.3%. The dual output regulating rectifier topology is suitable for multi-functional implantable devices. The adiabatic CP has an overall efficiency of 92.9% with an overall on-chip capacitance of 60 pF. The circuit was designed in a 180-nm CMOS technology.

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“…In [13], an AC-DC single-stage receiver with six power transistors is described. Both receivers in [13,15] occupy a large chip area and increase costs. In [16], the receiver uses four power transistors to regulate two output voltages; however, its control structure is complex, needing six hysteretic comparators.…”

Section: Introductionmentioning

confidence: 99%

“…In [16], the receiver uses four power transistors to regulate two output voltages; however, its control structure is complex, needing six hysteretic comparators. In this article, we only use four power transistors to convert the AC voltage into two regulating DC voltages, and the number of transistors and other components is less than those in [13,15]. The power transistors in [13,15] occupy a large chip area, which goes against the purpose of cost-saving.…”

Section: Introductionmentioning

confidence: 99%

A 125 KHz, Single-Stage, Dual-Output Wireless Power Receiver with PSM Modulation

et al. 2022

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This paper presents a 125 KHz, single-stage, dual-output wireless power receiver with pulse skip modulation (PSM). Multi-output receivers are proposed to supply different modules in one system. Conventional multi-output receivers contain a rectifier and a multi-output regulator, which degrade the power conversion efficiency (PCE) due to interstage loss of the rectifier and the regulator. Additionally, existing single-inductor multi-output (SIMO) receivers exhibit a cross-regulation phenomenon because of the sharing inductor, which decreases the stability of the output voltages, and the use of an inductor in SIMO receivers increases the cost of the circuit. The proposed receiver in this article realizes rectification and regulation in only one stage, which eliminates interstage loss; this improves the power conversion efficiency of the system and realizes dual-output voltages with only four power transistors without an inductor, which reduces the chip area and minimizes cost. There is no cross-regulation in this dual-output architecture because the dual-output voltages are charged by different phases of the input signal. PSM modulation was adopted to regulate output voltages for higher efficiency. The proposed single-stage, dual-output regulating rectifier delivers a maximum power of 47 mW, and the dual-output voltages are 1.8 V and 2 V. This receiver is designed by a 0.18 μm complementary metal-oxide-semiconductor (CMOS) process and realizes a peak efficiency of 86% when the output power ranges from 15 mW to 47 mW.

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Single-stage dual-output AC-DC converter for wireless power transmission

Cited by 24 publications

References 5 publications

IC-Based Rectification Circuit Techniques for Biomedical Energy-Harvesting Applications

IC-Based Rectification Circuit Techniques for Biomedical Energy-Harvesting Applications

Dual Output Regulating Rectifier for an Implantable Neural Interface

A 125 KHz, Single-Stage, Dual-Output Wireless Power Receiver with PSM Modulation

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