Self-timed circuits for energy harvesting AC power supplies

Siebert, Jeff; Collier, Jamie; Amirtharajah, Rajeevan

doi:10.1145/1077603.1077678

Cited by 11 publications

(7 citation statements)

References 13 publications

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“…Although there is ongoing research into asynchronous electronics that can operate efficiently on an alternating supply [15], [16], most electronics require a regulated dc input voltage. Both electromagnetic and piezoelectric harvesters generate time-varying voltages; therefore, rectification is essential.…”

Section: Ac-dc Conversion: Rectificationmentioning

confidence: 99%

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Szarka

Stark

Burrow

2012

IEEE Trans. Power Electron.

286

148

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In this paper, a summary of published techniques for power conditioning within energy harvesting systems is presented. The focus is on low-power systems, e.g, <10 mW, for kinetic energy harvesting. Published concepts are grouped according to functionality and results contrasted. The various techniques described are considered in terms of complexity, efficiency, quiescent power consumption, startup behavior, and utilization of the harvester compared to an optimum load. This paper concludes with an overview of power management techniques that aim to maximize the extracted power and the utilization of the energy harvester.

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Section: Ac-dc Conversion: Rectificationmentioning

confidence: 99%

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Szarka

Stark

Burrow

2012

IEEE Trans. Power Electron.

286

148

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“…Additionally, the combination of different harvesting strategies [101], may generate energy more efficiently by utilizing human power discriminately. Finally, close examination [102] on conditioning electronics components and electrical design helps boost efficiency output.…”

Section: Comparison Between Different Harvesting Principlesmentioning

confidence: 99%

Human power-based energy harvesting strategies for mobile electronic devices

Jia

Liu

2009

Front. Energy Power Eng. China

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Energy problems arise with the proliferation of mobile electronic devices, which range from entertainment tools to life saving medical instruments. The large amount of energy consumption and increasing mobility of electronic devices make it urgent that new power sources should be developed. It has been gradually recognized that the human body is highly flexible in generating applicable power from sources of heat dissipation, joint rotation, enforcement of body weight, vertical displacement of mass centers, and even elastic deformation of tissues and other attachments. These basic combinations of daily activities or metabolic phenomena open up possibilities for harvesting energy which is strong enough to power mobile or even implantable medical devices which could be used for a long time or be recharged permanently. A comprehensive review is presented in this paper on the latest developed or incubating electricity generation methods based on human power which would serve as promising candidates for future mobile power. Thermal and mechanical energy, investigated more thoroughly so far, will particularly be emphasized. Thermal energy relies on body heat and employs the property of thermoelectric materials, while mechanical energy is generally extracted in the form of enforcement or displacement excitation. For illustration purposes, the piezoelectric effect, dielectric elastomer and the electromagnetic induction couple, which can convert force directly into electricity, were also evaluated. Meanwhile, examples are given to explain how to adopt inertia generators for converting displacement energy via piezoelectric, electrostatic, electromagnetic or magnetostrictive vibrators. Finally, future prospects in harvesting energy from human power are made in conclusion.

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“…Conventional power-on-reset circuits typically use an RC charging delay to at least partially control the turnon voltage [15]. To design a power-on-reset circuit suitable for AC power supplies, a different approach was taken [2].…”

Section: Power-on-reset Circuitmentioning

confidence: 99%

“…The sensing circuit for this cell is built from two transmission gates, a precharge transistor, and a tri-state buffer. The memory cell and its sensing circuit are shown in Figure 10 where transistors M1, M2, and M3 make up the memory cell [2]. The gate of transistor M1 and the source diffusion of transistor M2 comprise the storage node capacitance.…”

Section: Ac Supply Memoriesmentioning

confidence: 99%

“…An energy scalable signal processing microarchitecture and circuit alternatives for implementing it are presented in Section 4. Since off-chip power electronics increase system cost and volume and limit energy harvesting operation due to losses in the conversion from AC to DC voltage, Sections 5 and 6 describe datapath and memory circuits, respectively, which can tolerate rapid variation in supply voltage and can be used to eliminate AC/DC conversion [2]. Finally, Section 7 presents conclusions and opportunities for future work.…”

Section: Introductionmentioning

confidence: 99%

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Circuits for energy harvesting sensor signal processing

Amirtharajah

Wenck

Collier

et al. 2006

2006 43rd ACM/IEEE Design Automation Conference

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The recent explosion in capability of embedded and portable electronics has not been matched by battery technology. The slow growth of battery energy density has limited device lifetime and added weight and volume. Passive energy harvesting from solar radiation, thermal sources, or mechanical vibration has potentially wide application in wearable and embedded sensors to complement batteries. The amount of energy from harvesting is typically small and highly variable, requiring circuits and architectures which are low power and can scale their power consumption with user requirements and available energy. We describe several circuit techniques for achieving these goals in signal processing applications for wireless sensor network nodes such as using Distributed Arithmetic to implement energy scalable signal processing algorithms. In addition, we propose increasing vibration energy harvesting efficiency by eliminating AC/DC conversion electronics, and have investigated self-timed circuits, poweron-reset circuitry, and memory for energy harvesting AC power supplies. These techniques can also be applied to energy harvesting from other sources. A chip will be fabricated to test the proposed circuits.

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Self-timed circuits for energy harvesting AC power supplies

Cited by 11 publications

References 13 publications

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Review of Power Conditioning for Kinetic Energy Harvesting Systems

Human power-based energy harvesting strategies for mobile electronic devices

Circuits for energy harvesting sensor signal processing

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