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This paper presents a low-power batteryless energy harvesting system for Internet of Things (IoT) applications. A dual-mode dc–dc converter is used to harvest the energy of a microscale photovoltaic (PV) transducer and provides energy, in the boost mode, to a super capacitor for storage. In the buck mode, the dc–dc converter provides energy to the load on demand. A piezoelectric transducer is used...
This paper presents an ultra-low-power boost converter for indoors photovoltaic energy harvesting applications. The boost converter, working in the discontinuous conduction mode (DCM), utilizes an active diode (AD) technique to avoid negative current flowing in the inductor and a control technique that allows supplying dual output voltage levels with sufficient power. The AD is implemented using a...
This paper presents a muli-input multi-output battery-less energy harvesting system for microscale wireless sensor nodes that combines piezoelectric and photovoltaic energy sources. The system undergoes four states of operation to achieve two voltage levels at the output of 1.2V and 3V. It is a dual path system that uses a single inductor for both boost and buck converter. A maximum power point tracking...
Electronic gas flow meters are expected to replace the current mechanical devices. One of the promising solutions is based on thermal MEMS sensor. In this paper, a novel system is introduced that combines a MEMS gas flow sensor and its interface circuit. A 15 bits ASIC is implemented to interface the sensor to an external processor through a standard serial communication. The CMOS 0.13 micrometer...
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