An Open-Loop Double-Carrier Simultaneous Wireless Power and Data Transfer System

Najjarzadegan, Mohammad; Hafshejani, Ehsan Hadizadeh; Mirabbasi, Shahriar

doi:10.1109/tcsii.2019.2910214

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…High-frequency inductors with a self-resonant frequency surpassing 300 MHz have been selected to alleviate the impact of parasitic Figure 11c illustrates the V out waveform of the receiver coil when the data rate is 3 Mbps (random bit stream). The voltage amplitudes for high and low data signals (V out_H = 11.9 V and V out_L = 9.6 V) closely match the calculated values (V out_H = 12.1 V and V out_L = 9.8 V) based on Equations (18) and (20). Similarly, the simulated MI approximates were 10%, which is consistent with the value from Equation (16).…”

Section: Resultssupporting

confidence: 84%

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High-Performance Wireless Power and Data Transmission System for Medical Implant Devices Using ASK Modulation

Zhu,

Tahir,

et al. 2024

Energies

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Wireless power and data transmission (WPDT) solutions for medical implants are highly desired. However, achieving a high-power transmission efficiency and data rate simultaneously over an inductive link remains a significant challenge. This paper presents an innovative WPDT circuit that incorporates additional MOSFETs with an inductor in a Class-E power amplifier (PA), achieving amplitude-shift keying (ASK) modulation to address this issue. Firstly, the efficiency of the inductive power transmission link and Class-E PA was analyzed, providing design insights. Then, leveraging the insights, the proposed circuit was designed in such a way that it could effectively switch between two load networks to maintain high transfer efficiency for ASK modulation. Based on the load networks, the relationship between introducing the inductor’s value and the data modulation index (MI) was derived to help achieve the desired high-power transmission efficiency. Additionally, the design and calculation of the proposed circuit are also presented. Finally, the proposed circuit was validated through simulations and experiments, demonstrating a power delivery to a load of 84.1 mW with a power transmission efficiency of 70.8% at a data rate and carrier frequency of 3 Mbps and 16 MHz, respectively. Furthermore, the bit error rate (BER) is less than 10−6 with an MI of 10%.

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Section: Resultssupporting

confidence: 84%

“…Various methods have been reported to enhance power transmission efficiency and data rates. Typically, two pairs of coils are used-one for power and one for data [16][17][18][19]. This setup can boost power transmission efficiency and data rates but may lead to complex circuitry and increased size.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Wireless Power and Data Transmission System for Medical Implant Devices Using ASK Modulation

Zhu,

Tahir,

et al. 2024

Energies

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“…Data telemetry modulation can be categorized into pulse‐based and carrier‐based techniques, and carrier‐based is the most common technique that is used in data telemetry modulations. Amplitude‐shift keying (ASK), frequency‐shift keying (FSK), phase‐shift keying (PSK) and its derivatives, carrier width modulation, and load‐shift keying are examples of carrier‐based methods 12–19 . These carrier‐based methods are used in the IMDs where the same low‐frequency carrier is used to supply the IMD's power.…”

Section: Introductionmentioning

confidence: 99%

“…Amplitude-shift keying (ASK), frequency-shift keying (FSK), phase-shift keying (PSK) and its derivatives, carrier width modulation, and load-shift keying are examples of carrier-based methods. [12][13][14][15][16][17][18][19] These carrier-based methods are used in the IMDs where the same low-frequency…”

mentioning

confidence: 99%

An ultra‐low‐power CWM/SCM demodulator for inductive‐powered IMDs with the DRCF ratio of 50% and the powering index of 75%

Arand,

Abiri,

Salehi

2024

Circuit Theory & Apps

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SummaryIn this paper, an ultra‐low‐power and area‐efficient demodulator circuit for wireless downlink SCM/CWM modulation schemes is proposed. The proposed demodulator offers high performances and allows simultaneous power and downlink data transmission over a single 13.56‐MHz inductive link. The proposed method requires only two carrier cycles per data bit period, and also, a power index of 75% is obtained. Although the proposed demodulator can be applicable to other wireless systems, here, it is intended for implantable medical devices. To prove the performance of the proposed demodulator circuit, it has been designed and post‐layout simulations are provided using a standard 65‐nm CMOS technology and occupies 27 × 32 μm2 of active area. Post‐layout simulation results indicate that with a 1‐V power supply, the proposed circuit achieves an ultra‐low‐power consumption of 8.51 μW at a data rate of 6.78 Mb/s corresponding to an energy efficiency of 1.25 pJ/bit.

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“…However, these units have very large off-chip capacitors and resistors which require extra post-processing work compared to a system-onchip circuit. Mohammad et al employed two separate power transmitters to stabilise the PTE of the PMU [6]. Cheng et al invented a new active rectifier, capable of providing different voltages, to maximise the PTE by reducing the number of system stages [2].…”

Section: Introductionmentioning

confidence: 99%

A Wireless Power Management Unit with a Novel Self-Tuned LDO for System-On-Chip Sensors

Chen

Georgiou

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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A wireless power management unit is presented in this work. The system size of 0.4mm 2 with the low power consumption of 87µW allow it to be applied in implantable biomedical applications and ex-vivo systems. The proposed system optimises the conventional slew-rate detection low dropout (LDO) circuit by using a self-tuned controlling block that reduces the response time to 100ns. The static power required for this LDO is reduced to 2µW. The band gap reference (BGR) is designed with a high power supply rejection ratio (PSRR) of 60dB at 100kHz, along with an output reference voltage deviation of 1mV, to deal with the power supply ripple caused by the load shift keying (LSK). The RF power is transmitted at 433MHz and the internal power management circuit is able to provide a 1.4V stable DC supply for a front end on-chip sensor.

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An Open-Loop Double-Carrier Simultaneous Wireless Power and Data Transfer System

Cited by 10 publications

References 16 publications

High-Performance Wireless Power and Data Transmission System for Medical Implant Devices Using ASK Modulation

High-Performance Wireless Power and Data Transmission System for Medical Implant Devices Using ASK Modulation

An ultra‐low‐power CWM/SCM demodulator for inductive‐powered IMDs with the DRCF ratio of 50% and the powering index of 75%

A Wireless Power Management Unit with a Novel Self-Tuned LDO for System-On-Chip Sensors

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