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The defense date of the thesis is 2014-07-30
The current date is 2019-02-18
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URN etd-0730114-012522 Statistics This thesis had been viewed 757 times. Download 5 times. Author Chin-Wen Chen Author's Email Address No Public. Department Electrical Engineering Year 2013 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 83 Title LOW-POWER FULL ON-CHIP ADAPTIVELY BIASED LOW-DROPOUT REGULATOR WITH TRANSIENT RESPONSE IMPROVEMENT Keyword Temperature sensor Low-dropout voltage regulator Low-dropout voltage regulator Temperature sensor Abstract An output-capacitorless low-dropout voltage regulator with transient response improvement is presented in this thesis. A low quiescent current of the proposed circuit achieves low power consumption. Adaptively biasing, active feedback, and slew-rate enhancement improve the transient response of the low-dropout regulator. In addition, a bandgap reference circuit for the low-dropout regulator is also included in this thesis. Besides, a low power low-voltage temperature sensor based upon a recently-published four-transistor core is presented. Compared to the earlier implementation, the proposed structure has a much lower power-supply sensitivity. The adaptively biased low-dropout regulator and the bandgap reference circuit are implemented in TSMC CMOS 0.18μm process and the nominal power supply voltage is 1.8V. According to the HSPICE simulation, the load current varies from 1μA to 100mA and the maximum of quiescent current is 88.4μA at heavy load. The dropout voltage is 200mV and the output voltage spike is 116mV in this work. The target output of the bandgap reference is 1V and the resulting temperature coefficient is 4.55ppm/℃ with the temperature varying from -25℃ to 85℃ and the supply voltage from 1.5V to 3.0V. The proposed temperature sensor was implemented in a TSMC 90nm 1P9M process and designed to operate at the nominal power supply voltage of 1V. Simulation results show that the linearity error of the proposed circuit is 0.29 ℃ over a 120℃ operating range with a supply voltage of 1V. The nominal power consumption is 29μW. Advisor Committee Shu-Chuan Huang - advisor
Files Date of Defense 2014-07-18 Date of Submission 2014-07-30