A Digital Controlled Self-Sustaining Regulator with Automatically Tunable Pumping Gain for Multiple-Input Energy Harvesting

• Main Authors: Bo-Han Song, 宋柏翰
• Other Authors: Tsung-Heng Tsai
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/42584911333034750813

碩士 === 國立中正大學 === 電機工程研究所 === 101 === This thesis completes a self-sustaining regulator for two input energy harvesting, and the harvester source are solar and high frequency radio-frequency identification (HF RFID). After simulation, we utilize the self-sustaining charge pump and digitally controlled boost dc-dc converter to further provide a 1V output voltage as the supply voltage for loading circuit under solar input voltage. In original, tradition charge pump transfer charge by diode-configured MOSFET. Threshold voltage of MOSFET and reverse charge sharing easily affected the performances, and the method could not be applied in energy harvesting low-voltage applications. Therefore, the novel self-sustaining charge pump circuit proposed in this thesis can utilize dynamic charge transfer switch (DTCS) to eliminate non-ideal problems. With different energy harvester input voltage values, self-sustaining negative feedback controller automatically adjusts conversion factor. Compared with the other controller, complexity and output ripple of the circuit are both lower than other case, and the circuit reduces the number of passive components, but the function is the same. Finally, the chip was implemented by Taiwan Semiconductor Manufacturing Company (TSMC) 0.18μm 1P6M CMOS mixed-signal polycide process, and the die area of the proposed chip is 1.538×1.368mm2.