| Summary: | 碩士 === 國立暨南國際大學 === 電機工程學系 === 94 === In the first part of this thesis, a 10-bit digital-to-analog converter is proposed to alleviate the output offset voltage. The circuit is composed of a 6-bit r-string DAC and a 10-bit R-2R DAC, which is suitable for medium or small size TFT-LCD. The circuit is realized by TSMC 0.35μm 2P4M35 CMOS process technology.
In the second part, a 20 GHz VCO with transmission line resonator is proposed. The experimental results had proved that the transmission line should be regarded as a inductor with very small inductance when it is operated at a very high frequency. Besides, a transmission line resonator performs high Q factor at such high frequency, whereas a planar spiral inductor does not. Hence, it is more suitable for high frequency application, such as Millimeter Wave. The circuit is realized by TSMC 0.18μm 1P6M18 CMOS process technology. The measured results show that the oscillator operate from 18.92 GHz to 20.76 GHz and the phase noise is -96dBc/Hz@1MHz offset.
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