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This work presents a low-voltage indoor energy harvesting using photovoltaic cell. The system doesn't use a dc-dc converter to boost the output voltage so that large external inductors and large capacitors are eliminated. A rechargeable battery is connected to the output for storing the energy. No other external components are needed in the system. A test chip is implemented using a 0.18um CMOS process...
In this paper, a wide-range operation and phase error calibration DLL-based clock generator is proposed. By using multi-band voltage controlled delay line (MBVCDL) and frequency multiplier to expand the operation frequency range of clock generator. The proposed clock generator uses detect window phase detector (DWPD) to effectively reduce phase error. The proposed DLL can reduce the maximum phase...
In phase-locked loop (PLL), the loop parameters such as loop bandwidth, phase margin and damping factor must be adjusted to minimize jitter and to guarantee stability. According to the restrictions of the PLL, this paper employs formula derives to find the relationship between the loop parameters. Therefore, the PLL uses time-to-digital converter (TDC) and programmable current mirror (PCM) to adjust...
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