A 2.5-V, 160-&amp;#x03BC;J-output piezoelectric energy harvester and power management IC for batteryless wireless switch (BWS) applications

Yang, Joonseok; Lee, Minbok; Park, Myeong-Jae; Jung, Sung Mi; Kim, Jaeha

doi:10.1109/vlsic.2015.7231291

Cited by 17 publications

(13 citation statements)

References 4 publications

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“…Unlike prior flipping-capacitor-based harvesters [16,17], the proposed harvesting interface maximizes the PZT output voltage (to its peak voltage), resulting in stronger mechanical damping and higher energy extraction without the usage of large capacitors for bias flipping. Prior works [6,7,14,15,20] require a bulky off-chip inductor, whereas the proposed circuit needs eight high-voltage capacitors (0.75 nF each), which can be integrated on chip. The proposed harvesting interface can handle strong input excitations with high open-circuit voltage (simulated results shown for up to 100 V) thanks to the capacitive-PECE technique, while achieving 3.37 × energy extraction improvement compared to an FBR-based harvester.…”

Section: Resultsmentioning

confidence: 99%

“…Ambient energy harvesting has been adapted as a solution to prolong battery life or make these devices self-powered using various harvesting sources [1][2][3][4][5]. However, to harvest energy from vibrations produced by human motion, piezoelectric transducers (PZTs) [6][7][8] and triboelectric nano-generators (TENG) [9,10] are the most suitable options.…”

Section: Introductionmentioning

confidence: 99%

“…Although there have been many harvesting interface designs proposed for low-voltage sources [11][12][13], few designs have been proposed for high-voltage sources. However, recently, a trend of energy harvesting from excitations with high open-circuit voltage (V OC ) generated by PZTs [6,14] and TENGs [9,10] has been observed. Partial electric charge extraction (PECE) [14] can theoretically handle excitations with unlimited V OC .…”

Section: Introductionmentioning

confidence: 99%

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A Piezoelectric Harvesting Interface with Capacitive Partial Electric Charge Extraction for Energy Harvesting from Irregular High-Voltage Input

2020

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A fully integrated piezoelectric energy harvesting interface is proposed for harvesting energy from irregular human motion. To handle irregular pulse inputs generated by the piezoelectric transducer (PZT), the proposed harvesting interface includes a wake-up controller that activates the harvesting interface only when human motion is detected and deformation is applied on the piezoelectric material, thereby keeping static power loss low. The PZT output voltage is increased to its peak voltage by removing any type of external load capacitance seen by the PZT during its deformation. Once the peak voltage is detected, a multi-voltage conversion-ratio-based switched-capacitor circuit is activated to transfer PZT-generated energy to the battery in multiple ratio steps to maximize the conversion efficiency, with the help of a carefully designed harvesting controller. To deal with open-circuit voltages (V OCS ) higher than the maximum voltage tolerated (V MAX ) by available technology, capacitive partial electric charge extraction is activated every time the PZT output voltage approaches the V MAX . The proposed harvesting interface extracts 3.37 times more energy than a conventional full-bridge rectifier-based harvesting scheme.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Piezoelectric Harvesting Interface with Capacitive Partial Electric Charge Extraction for Energy Harvesting from Irregular High-Voltage Input

2020

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“…Even small batteries that realize wearable size must provide resources for long-term operation. The ultimate target of low power design is to guarantee continued operation in an autonomous energy supply environment by environmental power generation with an energy harvester using a heat source [10], [11], [28] and vibration [29]. The energy consumption of the entire sensor system node must be less than the environmental power generation energy.…”

Section: Figure 3 Portrays a Block Diagram Of A Typicalmentioning

confidence: 99%

Recent Progress of Biomedical Processor SoC for Wearable Healthcare Application: A Review

Yoshimoto

Izumi

2019

IEICE Trans. Electron.

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This paper surveys advances in biomedical processor SoC technology for healthcare application and reviews state-of-the-art architecture and circuits used in SoC integration. Particularly, this paper categorizes and describes techniques for improving power efficiency in communication, computation, and sensing. Additionally, it surveys accuracy enhancement techniques for bio-signal measurement and recognition. Finally, we have discussed the potential new directions for development as well as research.

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“…In recent years, a few harvesting interface designs [11,12,13,14] have been published that can deal with discontinuous energy input with high voltages. However, these designs suffer from a number of limitations:In high-voltage harvesting interfaces [11,12,13], the power stage consists of a combination of HV PMOS and NMOS. HV NMOS can be driven by output/battery voltage ( V BAT ) referenced drivers.…”

Section: Introductionmentioning

confidence: 99%

A High-Voltage Energy-Harvesting Interface for Irregular Kinetic Energy Harvesting in IoT Systems with 1365% Improvement Using All-NMOS Power Switches and Ultra-low Quiescent Current Controller

Saif

Khan

Lee

et al. 2019

Sensors

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An energy-harvesting interface for kinetic energy harvesting from high-voltage piezoelectric and triboelectric generators is proposed in this paper. Unlike the conventional kinetic energy-harvesting interfaces optimized for continuous sinusoidal input, the proposed harvesting interface can efficiently handle irregular and random high voltage energy inputs. An N-type mosfet (NMOS)-only power stage design is introduced to simplify power switch drivers and minimize conduction loss. Controller active mode power is also reduced by introducing a new voltage peak detector. For efficient operation with potentially long intervals between random kinetic energy inputs, standby power consumption is minimized by monitoring the input with a 43 pW wake-up controller and power-gating all other circuits during the standby intervals. The proposed harvesting interface can harvest energy from a wide range of energy inputs, 10 s of nJ to 10 s of µJ energy/pulse, with an input voltage range of 5–200 V and an output range of 2.4–4 V under discontinuous as well as continuous excitation. The proposed interface is examined in two scenarios, with integrated power stage devices (maximum input 45 V) and with discrete power stage devices (maximum input 200 V), and the harvesting efficiency is improved by up to 600% and 1350%, respectively, compared to the case when harvesting is performed with a full bridge rectifier.

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A 2.5-V, 160-μJ-output piezoelectric energy harvester and power management IC for batteryless wireless switch (BWS) applications

Cited by 17 publications

References 4 publications

A Piezoelectric Harvesting Interface with Capacitive Partial Electric Charge Extraction for Energy Harvesting from Irregular High-Voltage Input

A Piezoelectric Harvesting Interface with Capacitive Partial Electric Charge Extraction for Energy Harvesting from Irregular High-Voltage Input

Recent Progress of Biomedical Processor SoC for Wearable Healthcare Application: A Review

A High-Voltage Energy-Harvesting Interface for Irregular Kinetic Energy Harvesting in IoT Systems with 1365% Improvement Using All-NMOS Power Switches and Ultra-low Quiescent Current Controller

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