| Summary: | 碩士 === 國立中興大學 === 電機工程學系所 === 94 === ABSTRACT
A PFM boost converter which has the advantages of the low supply voltage and zero quiescent current consumption is proposed in this thesis. Nowadays, the trends of the battery-operated portable electronic devices are small volume, light weight and long stand-by time. Due to these trends, a low voltage and zero quiescent current technique for the converter is needed. It not only can reduce the supply voltage to a single cell battery voltage, for example 1.2Volts or 1.5Volts, but also can extend the service time (stand-by time) of the portable electronic devices by the zero quiescent current consumption.
Besides, a bandgap reference circuit is an essential component of the converter. Because the output reference voltage is affected by the temperature variation, the precision of the output voltage of the converter will also be affected directly. Hence, a new bandgap reference circuit with a temperature compensation mechanism is proposed in this thesis. It mainly utilizes a temperature compensation generator to compensate the temperature variation of the output reference voltage in different temperature zones. Therefore, a higher precision output voltage of the converter which will be affected less by temperature variation can be obtained.
In this thesis, the converter is implemented by using the TSMC 0.35µm 2P4M 3.3V/5V CMOS process and the total chip area is 1.5×1.5mm².
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