Low power electronic interface for electrostatic energy harvesters

Phan, Tra Nguyen; Azadmehr, Mehdi; Le, Cuong Phu; Halvorsen, Einar

doi:10.1088/1742-6596/660/1/012087

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…In the low power interface for a energy harvesting double charge pump proposed in Reference [9], the authors use two bump circuits for activating and deactivating the flyback switch, as shown in Figure 22. Capacitors Cvar 1 and Cvar 2 work deferentially and pump charges from the reservoir capacitance Cres to the series connected capacitors Cs and Cs2.…”

Section: Double Charge Pump Interface With Bump Circuitsmentioning

confidence: 99%

“…This operation will take advantage of the variable power behavior of the proposed bump circuit. More detailed description of this charge pump is found in Reference [9].…”

Section: Double Charge Pump Interface With Bump Circuitsmentioning

confidence: 99%

“…One of the simplest and well-known voltage similarity circuits is the bump circuit presented by Tobias Delbrück [8] in 1991. Voltage similarity circuits are widely used in analog systems, such as in ultra low power energy harvesters [9], neuromorphic systems [10], and biological inspired circuits [11]. One of the main challenges with these circuits are the relatively high power consumption as they must be active all the time.…”

Section: Introductionmentioning

confidence: 99%

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An Analog Voltage Similarity Circuit with a Bell-Shaped Power Consumption

2021

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This paper presents a voltage similarity circuit (bump circuit) based on a novel voltage correlator. The proposed circuit is characterized by a power consumption which depends on the similarity between the two inputs. The sensitivity of the bump circuit and the power consumption are at the highest values when the inputs are equal. As the similarity between the input voltages decreases, the total current consumption decreases with a bell-shaped behavior. The proposed bump circuit is very simple in design, made of a new voltage correlator circuit in combination with a differential pair and mimics the behavior of the classical bump circuit. The voltage correlator was implemented using AMS−350nm CMOS technology. Simulation and measurement results suggests that a low power consumption may be achieved if the circuit is used in applications where the input signals have large dissimilarity for most of the circuit operation.

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Section: Double Charge Pump Interface With Bump Circuitsmentioning

confidence: 99%

“…This operation will take advantage of the variable power behavior of the proposed bump circuit. More detailed description of this charge pump is found in Reference [9].…”

Section: Double Charge Pump Interface With Bump Circuitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Analog Voltage Similarity Circuit with a Bell-Shaped Power Consumption

2021

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“…The operation of electrostatic MEMC is based on a change of the variable capacitor capacitance under the influence of external mechanical oscillations (vibrations) [4,7]. In order to transfer the electrical energy obtained using the MEMC to the load, the converter is combined with the corresponding electrical circuits (conditioning or interface circuits) [8][9][10][11][12][13]. Such a system as a whole is called as microelectromechanical generator (MEMG).…”

Section: Introductionmentioning

confidence: 99%

Diode-capacitor voltage divider for electrostatic microelectromechanical generator

Dragunov,

Ostertak,

Sinitskiy

et al. 2023

E3S Web of Conf.

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The simulation results of the voltage divider operation based on switchable capacitors with diode switching for electrostatic microelectromechanical (MEM) generators are presented. It has been established that for the divider with diode-switched capacitors, the voltage dividing coefficient is not remain the same when the load resistance changes, and for higher load resistances, the load voltage asymptotically approaches the value of the power source. Analytical expressions have been obtained for estimating the parameters of the divider with diode switching, which allow evaluating its characteristics at the preliminary stage of the MEM generator design. It has been shown that the simulation of the diode-capacitor voltage divider operation has to be carried out taking into account the dynamic volt-ampere characteristics of diodes.

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Asymmetric disappearance and periodic asymmetric phenomena of rocking dynamics in micro dual-capacitive energy harvester

Zhu

Guo

Huang

2018

AIP Conference Proceedings

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Energy harvesting from vibration with cross-linked polypropylene piezoelectrets AIP Advances 5, 077185 (2015) Abstract. We study asymmetric disappearance and period asymmetric phenomena starting with a rocking dynamic in micro dual-capacitive energy harvester. The mathematical model includes nonlinear electrostatic forces from the variable dual capacitor, the numerical functioned forces provided by suspending springs, linear damping forces and an external vibration force. The suspending plate and its elastic supports were designed in a symmetric structure in the micro capacitor, however, the reported energy harvester was unavoidable starting with a asymmetric motion in the real vibration environment. We found that the designed dual energy capacitive harvester can harvest ~6μW with 10V input voltage, and under 0.8 time's resonant frequency vibration. We also discovered that the rocking dynamics of the suspended plate can be showed with an asymmetric disappearance or periodic asymmetric phenomena starting with an asymmetric motion. The study of these asymmetric disappearance and period asymmetric phenomena were not only important for the design of the stability of the micro capacitor for sensor or the energy harvesting, but also gave a deep understanding of the rocking nonlinear dynamics of the complex micro structures and beams.

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Low power electronic interface for electrostatic energy harvesters

Cited by 5 publications

References 11 publications

An Analog Voltage Similarity Circuit with a Bell-Shaped Power Consumption

An Analog Voltage Similarity Circuit with a Bell-Shaped Power Consumption

Diode-capacitor voltage divider for electrostatic microelectromechanical generator

Asymmetric disappearance and periodic asymmetric phenomena of rocking dynamics in micro dual-capacitive energy harvester

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