A Colpitts Oscillator-Based Self-Starting Boost Converter for Thermoelectric Energy Harvesting With 40-mV Startup Voltage and 75% Maximum Efficiency

Lim, Bianca; Seo, Jeong-Il; Lee, Sang‐Gug

doi:10.1109/jssc.2018.2863951

Cited by 51 publications

(18 citation statements)

References 19 publications

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“…With the development of the Internet of Things and wearable devices, the low supply voltage and low power requirements of these applications challenge the power management circuit design. The micro energy harvesting technology, as a reliable solution, can generate electrical energy from other energy sources like solar [1,2,3], vibrations [4], thermal [5,6,7,8,9,10,11,12,13,14,15,16,17,18], piezoelectric [19,20,21] and radio waves [22,23,24]. However, the voltage generated by thermoelectric generators (TEGs) or photovoltaic (PV) panels is only a few tens of millivolts or a few hundred millivolts, which is hard to drive general circuits.…”

Section: Introductionmentioning

confidence: 99%

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

Guo

Chen

Lei

et al. 2020

IEICE Electron. Express

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A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting is presented in this paper. It is found that the cross-coupled LC oscillator with asymmetric inductors can output much higher voltage than ordinary oscillators. Thus, the asymmetric inductors reconfigurable technology (AIRT) is used in the self-start circuit and a minimum startup voltage of 150mV is achieved. The AIRT realizes dual-output and improves the utilization of chip pins by reusing inductors in the self-start circuit and the boost system. The self-start circuit and the boost system are implemented in a 0.13µm CMOS process and a 73.7% converter efficiency is achieved. The chip area of the boost converter is 0.155mm 2. The area occupied by self-start circuit is only of 0.006mm 2 without other extra energy sources.

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Section: Introductionmentioning

confidence: 99%

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

Guo

Chen

Lei

et al. 2020

IEICE Electron. Express

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“…As a matter of fact, several low-input boost dc-dc converters have been reported [5][6][7][8][9][10][11][12][13]. As the output voltage of a thermoelectric generator (TEG) for available thermal gradients (2-3 K) is <100 mV [5,6], the startup schemes for TEG generally need extra external components, complicated assisting circuits and expensive process manufacture [7][8][9][10]. For example, an off-chip piezoelectric transformer [7] and two off-chip inductors [8] are used to kick-start the system operation.…”

Section: Introductionmentioning

confidence: 99%

“…As the output voltage of a thermoelectric generator (TEG) for available thermal gradients (2-3 K) is <100 mV [5,6], the startup schemes for TEG generally need extra external components, complicated assisting circuits and expensive process manufacture [7][8][9][10]. For example, an off-chip piezoelectric transformer [7] and two off-chip inductors [8] are used to kick-start the system operation. Moreover, an expensive mechanical vibration switch, post-fabrication processing and costly native metal oxide semiconductor field effect transistors (MOSFETs) are adopted in [9][10][11], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…As a matter of fact, several low‐input boost dc–dc converters have been reported [5–13]. As the output voltage of a thermoelectric generator (TEG) for available thermal gradients (2–3 K) is <100 mV [5, 6], the startup schemes for TEG generally need extra external components, complicated assisting circuits and expensive process manufacture [7–10].…”

Section: Introductionmentioning

confidence: 99%

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10 MHz boost converter with subthreshold voltage startup and predictive dead‐time techniques for energy‐harvesting systems

Huang

Liao

Liu

2020

IET Power Electronics

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A 10 MHz synchronous boost converter with the subthreshold startup scheme and predictive dead-time control for energy-harvesting systems is presented in this study. The input feed-forward technique is adopted to achieve a fast line response, and a three-stage startup technique is proposed to realise subthreshold voltage startup without using any extra startup circuits or special devices. Moreover, the efficiency of the high-frequency converter can be improved by the proposed predictive dead-time control with a high resolution of ∼300 ps. The proposed converter is implemented in a standard 0.18 μm complimentary metal oxide semiconductor process and occupies a die area of 1.4 × 1.5 mm 2. Experimental results show that the input voltage ranges from 0.3 to 1.5 V at 1.8 V output, and the minimum startup voltage is 0.3 V. Under V IN = 1.5 V, V OUT = 1.8 V and 150 mA load, the power efficiency can be improved by 2.6% because of the proposed predictive dead-time control. The peak efficiency can reach 90.7% under V IN = 1.5 V. The line transient response can be improved with small overshoot voltage at the output.

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“…Because of the need for the off-chip transformer and because JFET is not compatible with CMOS technology, these approaches are limited in application. Another solutions [4,12,18] use an LC oscillator based on very-low-threshold-voltage MOS transistors and a Dickson charge pump to generate a sufficiently high start-up voltage.…”

Section: Introductionmentioning

confidence: 99%

Light-Powered Starter for Micro-Power Boost DC–DC Converter for CMOS Image Sensors

Blakiewicz

Jakusz

Kłosowski

et al. 2019

Circuits Syst Signal Process

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The design of a starter for a low-voltage, micro-power boost DC-DC converter intended for powering CMOS image sensors is presented. A unique feature of the starter is extremely low current, below 1 nA, supplying its control circuit. Therefore, a high-voltage (1.3 V) configuration of series-connected photovoltaic diodes available in a standard CMOS process or a small external LED working in photovoltaic mode can be used as an auxiliary supply for the control circuit. With this auxiliary supply, the starter can generate a starting voltage from 1 to 2.7 V using 50-200 mV supply voltage. The starter was verified by simulations and measurements of a prototype chip fabricated in a standard 180-nm CMOS technology. The results of simulations and tests showed correct operation of the starter in the temperature from 0 to 50°C and under process parameters variation.

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A Colpitts Oscillator-Based Self-Starting Boost Converter for Thermoelectric Energy Harvesting With 40-mV Startup Voltage and 75% Maximum Efficiency

Cited by 51 publications

References 19 publications

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

A self-start circuit with asymmetric inductors reconfigurable technology for dual-output boost converter for energy harvesting

10 MHz boost converter with subthreshold voltage startup and predictive dead‐time techniques for energy‐harvesting systems

Light-Powered Starter for Micro-Power Boost DC–DC Converter for CMOS Image Sensors

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