Browsing by Author "Nagateja, T."

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A Single-Inductor Triple-Output Converter with an Automatic Detection of DC or AC Energy Harvesting Source for Supplying 93% Efficiency and 0.05mV/mA Cross Regulation to Wearable Electronics
(2019-01-01)
Nagateja, T.
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Chen, Shao-Qi
;
Chu, Li-Cheng
;
Chen, Ke-Horng
;
Lin, Ying-Hsi
the proposed single-inductor triple-output (SITO) converter can accept both DC battery voltage and AC energy harvesting voltage to provide a triple step up and down outputs. Storing the energy to the H-bridge capacitor first and pumping it later can ensure a continuous inductor current for reducing the output voltage ripple by 67%. Due to the H-bridge, the inductor current value is reduced to 1/5X to achieve high efficiency of 93% under the current loading of 120mA. Moreover, the proposed PWM and the adaptive on-time hybrid controller uses different modulation methods in a single controller to meet the requirements of different multiple outputs.
RF Harvesting System for Low-Power Applications Using FinFETs
(2019-01-01)
Nagateja, T.
;
Srinivasulu, A.
;
Pal, Dipankar
;
交大名義發表
;
National Chiao Tung University
Two high efficiency FinFET-based negative voltage rectifiers for radio frequency (RF) applications have been proposed. These circuits have very good power conversion efficiency (PCE) especially in small RF input conditions. The designs are simple, yet the novelty lies in realization utilizing normal threshold voltage Si FinFET (NVT), low threshold voltage Si FinFET (LVT), high threshold voltage Si FinFET (HVT) which offers power efficient solutions for RF-harvesting applications. Simulations are carried out on 20 nm FinFET model files employing Cadence software. Performance comparisons of these three models have been done to validate the two-designs and to benchmark them. We have investigated how to improve parameters such as the output DC voltage, output DC power and PCE of rectifier. With LVT FinFET the second rectifier proposed offers 92% of PCE, -342 mV of DC output voltage at RF input of 0.4 V at 915 MHz frequency which is the best performance.