| Summary: | 碩士 === 國立中正大學 === 電機工程所 === 98 === This thesis completes a 0.5V input digital controlled boost dc-dc converter for energy harvesting. After simulation, the converter can provide a 1V output voltage as the supply voltage for loading circuit under 0.5V input voltage. The output loading current of the converter is 10mA – 100mA. In order to avoid limit-cycle oscillation, a digital sigma-delta modulator was added to the control circuit to increase the equivalent resolution of DPWM. After simulation, the 4-bit resolution core DPWM can have a equivalent 10-bit resolution, and prevents the limit-cycling oscillation while boosting output voltage to 1V. In this thesis, a A/D differ from common A/D such as ring-oscillator A/D or delay-line A/D was proposed. The A/D uses a comparator as the main circuit of it, and is known as comparator-based A/D. Compared with the traditional A/D, the complexity of comparator-based A/D is lower, but the function is the same, they all can analyze the difference between converter output voltage and reference voltage. Finally, this thesis uses TSMC 0.18?m 1P6M technology to realize the circuit structure of this digital controlled boost dc-dc converter for energy harvesting.
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