Results 201 to 210 of about 655 (256)
Terahertz Science and Technology in Astronomy, Telecommunications, and Biophysics. [PDF]
Research (Wash D C)Li J +7 more
europepmc +1 more source
Arthritis Care &Research, EarlyView.Objective This study aimed to describe real‐world trends in preconception and prenatal use of antirheumatic drugs among pregnant individuals with rheumatic diseases in Ontario, Canada. Methods We conducted a time‐series analysis using repeated cross‐sectional data to examine annual patterns of disease‐modifying antirheumatic drug (DMARD) use among ...
Shenthuraan Tharmarajah +6 more
wiley +1 more source
Novel Technologies towards the Implementation and Exploitation of "Green" Wireless Agriculture Sensors. [PDF]
Sensors (Basel)Vassiliou L +4 more
europepmc +1 more source
A Review of Miniature Radio Transmitters for Wildlife Tracking. [PDF]
Sensors (Basel)Toledo S.
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Experimental investigation on slotted Koch snowflake fractal patch rectenna. [PDF]
Sci RepSeng MW +4 more
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Analysis of Voltage Doubler Behavior of 2.45-GHz Voltage Doubler-Type Rectenna
IEEE Transactions on Microwave Theory and Techniques, 2017This paper describes the voltage doubler (VD) behavior of a 2.45-GHz VD-type rectenna. An important feature of the developed VD-type rectenna is the absence of the charge pump capacitor that is present in conventional VDs. Based on the circuit simulation and measurement results, the developed VD-type rectenna shows drastic improvement to the radio ...
Tomohiko Mitani
exaly +2 more sources
Improved active‐diode circuit used in voltage doubler
International Journal of Circuit Theory and Applications, 2012SUMMARYAn improved active‐diode circuit, which makes use of positive feedback to achieve fast on/off transition, is presented in this paper. The proposed active‐diode circuit can be embedded into a voltage doubler to replace the commonly used dead‐time circuit and to eliminate reverse current. In addition, the relationship between oscillation frequency,
Jingbin Jia, Ka Nang Leung
exaly +2 more sources
A low-voltage high-efficiency voltage doubler for thermoelectric energy harvesting
2013 IEEE International Conference of Electron Devices and Solid-state Circuits, 2013This paper presents a low-voltage high-efficiency voltage doubler for thermoelectric energy harvesting. A negative charge pump is used to reduce on-resistance of PMOSFET load switches. Additional circuitry for achieving high efficiency just requires small chip-area and low-cost. The voltage doubler is implemented in 0.13-μm 1.2V CMOS process.
Mok Philip K T +2 more
exaly +2 more sources
A Step-Up DC–DC Converter With a Resonant Voltage Doubler
IEEE Transactions on Industrial Electronics, 2007A step-up dc-dc converter with a resonant voltage doubler is proposed. The proposed converter is composed of an active-clamp circuit and a resonant voltage doubler. The active-clamp circuit, which is controlled by dual asymmetrical pulsewidth modulation of the primary side, reduces the voltage spikes of main switches and limits the voltage stress of ...
Woo-Young Choi, Kwon Bonghwan
exaly +3 more sources
A voltage-sensorless PFC voltage doubler
2012 15th International Power Electronics and Motion Control Conference (EPE/PEMC), 2012This paper proposes a voltage-doubling rectifier, or voltage doubler, with power factor correction (PFC) function and without voltage sensors on the ac and dc sides. The rectifier only uses an ac-side current sensor. The voltage information required for the PFC control is obtained from the ac-side current and its derivative in the on and off durations ...
Junichi Yamamoto +2 more
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