An RF-Energy Harvester and IR-UWB Transmitter for Ultra-Low-Power Battery-Less Biosensors

Schmickl, Stefan; Faseth, Thomas; Pretl, Harald

doi:10.1109/tcsi.2020.2970765

Cited by 34 publications

(17 citation statements)

References 13 publications

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“…The power consumption of the high-speed switch is in the order of 0.1 µA for 3 V power supply [19]. The popular method for producing impulse signal is by using digital AN D gates, in which one of the inputs is connected to the data source, and another branch is connected with a delayed version of data by digital buffer gates [20]. By using the number of buffer gates, we can control the delay value and pulse width.…”

Section: Transmitter Setup and Electronicsmentioning

confidence: 99%

Galvanic Impulse Wireless Communication for Biomedical Implants

2021

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Wireless intra-body communication is a promising approach for providing efficient and secure connectivity for medical implants. The low power consumption of the electronics and the conductivity of the biological tissues facilitate the system implementation, which makes the technique more powerefficient than the traditional radio frequency wireless systems. The galvanic intra-body communication uses the electrical current for signal transmission in the conductive medium of the biological tissues. In this paper, we propose an ultra-low-power communication approach by implementing a galvanic impulse method for communication between an implant and an on-body device. The communication system is designed, manufactured with off-the-shelf electronic components, and measured in the phantom and in-vivo animal experiment. The implant power consumption is 45 µW for the data rate of 64 kbps with a bit error percentage below 0.5% for the implant depth of 14 cm. The design supports long-lasting battery-powered implant sensory and communication system. INDEX TERMS Galvanic coupling, intra-body communication, biomedical implants, biomedical electronics, ultra-wideband.

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Section: Transmitter Setup and Electronicsmentioning

confidence: 99%

Galvanic Impulse Wireless Communication for Biomedical Implants

2021

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“…These bands are available worldwide, and allow (at least) a maximum allowed transmitted power of 2 W ERP [4], which corresponds to a maximum available power at the receiving node of approx. 25 µW at a distance of 10 m [17].…”

Section: Rf-energy-harvestingmentioning

confidence: 99%

“…The design challenge of such RF-to-DC rectifiers/voltage multipliers (RVMs) is to achieve the highest possible power conversion efficiency (PCE). In general, there are RVM topologies that use diodes or diode-connected transistors in differential full-wave [5,26] or single-ended half-wave rectifiers [10,16,17]. Using Schottky diodes [11]-because of their lower turn-on voltage-is another possibility, but might not be available in a chosen technology.…”

Section: Rf-energy-harvestingmentioning

confidence: 99%

“…A drawback is the large process sensitivity of this threshold voltage and therefore the risk of current back-flow due to the limited reverse isolation of the used MOSFETs, discharging the energy storage element. The work in [17] demonstrates how the concept of a simple zero-V th 5-stage Dickson charge-pump can be combined with an ultra-low-power diode (ULPD) [9] in the last stage to effectively prevent current from flowing from the output buffer capacitor back into the circuit, as shown in Fig. 1.…”

Section: Rf-energy-harvestingmentioning

confidence: 99%

“…In this SoC a complete EEG signal acquisition system is realized, consisting of a pre-amplifier [19] and an ultra-low-power SAR ADC [18]. After decimation, the ADC data is protected by forward error correction and sent via an ultra-low-power impulse-radio ultra-wideband (IR-UWB) transmitter [17] with a data rate of 5.12 kbps using a double pulse interval coded alphabet. We could obtain an indoor range of ≈ 12 m with a custom built base-station.…”

Section: Application Examplementioning

confidence: 99%

See 2 more Smart Citations

Microwatt power management: challenges of on-chip energy harvesting

Schmickl

Faseth

Pretl

2020

Elektrotech. Inftech.

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IoT devices become more and more popular which implies a growing interest in easily maintainable and battery-independent power sources, as wires and batteries are unpractical in application scenarios where billions of devices get deployed. To keep the costs low and to achieve the smallest possible form factor, SoC implementations with integrated energy harvesting and power management units are a welcome innovation.On-chip energy harvesting solutions are typically only capable of supplying power in the order of microwatts. A significant design challenge exists for the functional blocks of the IoT-SoC as well as for the power management unit itself as the harvested voltage has to be converted to a higher and more usable voltage. Simultaneously, the power management blocks have to be as efficient as possible with the lowest possible quiescent currents.In this paper, we provide a look at on-chip microwatt power management. Starting with the energy-harvesting from RF power or light, we then show state-of-the-art implementations of ultra-low power voltage references and ultra-low power low-dropout regulator (LDO) designs.

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An Optimized IR-UWB Communication System with Interference Reduction on a Narrowband System Using Genetic Algorithm

Khalesi

Ghods

2021

Wireless Pers Commun

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An RF-Energy Harvester and IR-UWB Transmitter for Ultra-Low-Power Battery-Less Biosensors

Cited by 34 publications

References 13 publications

Galvanic Impulse Wireless Communication for Biomedical Implants

Galvanic Impulse Wireless Communication for Biomedical Implants

Microwatt power management: challenges of on-chip energy harvesting

An Optimized IR-UWB Communication System with Interference Reduction on a Narrowband System Using Genetic Algorithm

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