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This paper investigates a high power factor switch-based wireless power transfer front-end circuit for heterogeneous systems. This circuit uses an integrated switching rectifier, implemented in 0.18um 1.8V/5V CMOS process. An integrated pair of phase synchronizers is used to align the waveshape of a wirelessly-coupled sinusoidal voltage source in the receiving coil to the corresponding conducting...
This paper deals with attractive voltage-source single-ended sub-resonant HF inverter as a simple wireless power transfer (WPT) based on unidirectional IPT in addition to Dual Active HF inverter and HF rectifier as transmitter and receiver of WPT is developed for bidirectional EV2H smart energy management architecture. Firstly, the voltage source single-ended sub-resonant HF inverter using a single...
Wireless battery charger for implantable biomedical devices (IMDs) with pulsed-current pattern is proposed for extending battery lifetime and faster charging. Also a compensation technique based on capacitor switching is presented in order to overcome the load variation effect on charging current. The data and power telemetry is separated in time domain and the power consumption is minimized during...
This paper presents a novel data link for electric vehicles charged through inductive power transfer (IPT) systems. The data link uses the magnetically coupled coils as transmission medium. The data link is intended to transfer the instantaneous current and voltage values in the power receiving circuitry on the electric vehicle (EV) platform. One key goal is to enable robust and reliable communication...
In this study, a novel phase controlled of single switch active rectifier (S-SAR) is investigated for applications in wireless energy transfer. The proposed rectifier structure is based on the connection of controllable single switch thorough full bridge rectifier and regulation by a phase-shifted PWM signal. Theoretical and simulation results show that the performance of the proposed active rectifier...
A 25 kW wireless charger design for electric vehicles is presented in this paper. The wireless charger consist of three phase power factor corrector (PFC), three phase resonant inverter, primary and secondary coils with series resonant compensation, and a rectifier. In the proposed design, PFC provides a constant voltage DC Bus and the whole output regulation is done by the resonant inverter. It simplifies...
Wireless charging is developing into a standard feature of portable electronic devices to cut the last wire. Resonant wireless power transfer (R-WPT) using magnetic resonance emerges as a promising approach, as it provides spatial freedom and can charge multiple devices simultaneously. ISM-band frequencies such as 6.78MHz or 13.56MHz are commonly used as the resonant frequency of the LC tank [1–4]...
A piezoelectric-based energy harvesting and power management IC that can supply a total energy of 160-μJ at 2.5V from a single button-pressing action to realize a batteryless wireless remote switch (BWS) is presented. The IC uses a 6:1 series-parallel switched-capacitor converter and a bias-flipping inductor to match the impedance, down-convert the voltage, and maximize the total energy harvested...
Powering active implantable devices is challenging. Implants must be small and have a long lifetime. Wireless power offers energy over the life of the device. Using integrated circuits for managing wireless power transfer allows for a small implant. Often when implemented in CMOS, a synchronous rectifier is used to achieve AC-DC conversion. Current spikes can occur in the rectifier and must be considered...
We present an active full-wave rectifier for wireless energy harvesting applications. In this technique we are going to use high speed comparators to drive the MOSFETs as Active Diode. This technique is superior to passive on-chip or off-chip rectifiers using PN junction diodes and diodes with parallel transistor or Schottky diode for low power applications. Passive rectifiers induce large forward...
A wide variety of applications can benefit from near-field wireless power transfer using coupled inductive links, such as wireless sensors and implantable microelectronic devices. The use of inductive power transmission is expected to see an explosive growth over the next decade as engineers try to cut the last cord from mobile electronics, small home appliances, and even electric vehicles [1]. The...
A 13.56MHz wireless power transfer system with a 1X/2X reconfigurable resonant regulating (R3) rectifier and wireless power control for biomedical implants is presented. Output voltage regulation is achieved through two mechanisms: the local PWM loop of the secondary side controls the duty cycle of switching the rectifier between the 1X and 2X modes; and to adapt to load and coupling variations, the...
In this paper the architecture and performance of a co-integrated 60 GHz on-chip wireless energy harvester and ultra-low power (ULP) radio in 65-nm CMOS are discussed. Integration of an on-chip antenna with wireless power receiver and wireless data transfer module is the crucial next step to achieve compact and high efficiency fully-integrated monolithic wireless sensor nodes. A single-pole-single-throw...
In this paper, the design of a class E synchronous rectifier, working in the 900 MHz frequency band and based on an Enhancement-mode Pseudomorphic High Electron Mobility Transistor (E-PHEMT), is proposed. Thanks to its small on-state resistance and its slightly positive threshold voltage, this type of device may offer an excellent performance when operated as a switch without biasing its gate terminal...
The wireless power transmission technology using an electro-magnetic resonant coupler (EMRC) has been applied to an isolated direct gate driver for GaN power switching devices. This direct gate driver with the Drive-by-Microwave technologies dose not needs an additional isolated voltage source and a photo-coupler because it can supply an isolated gate signal and signal power all together. The wireless...
Ubiquitous monitoring of sensor data and long term reliable operation of sensor units have been studied extensively either for environmental monitoring or for biomedical applications. Long term operation of sensor units requires continuous wireless signal at the output. The proposed rectifier unit is designed and simulated using 0.5-μm standard CMOS process. Simulation results show that power supply...
This paper proposes an omnidirectional wireless power receiving IC for implanted biomedical applications. The IC consists of new power receiving circuits (switch-mode CMOS Rectifier) and new power combination circuits (Skipping Booster). By predicting the coming of the current zero-cross-point (ZCP), the proposed CMOS rectifier switches current with more precise timing. By skipping the rectification...
The potential application space for miniaturized systems like wireless microsensors is expansive, from reconnaissance mission work and remote sensors to biomedical implants and disposable consumer products. Conforming to microscale dimensions, however, constrains energy and power to such an extent that sustaining critical power-hungry functions like wireless communication is next to impossible. Harvesting...
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