通过优化集成电感的设计，同时采用NMOS管和开关电容阵列作为可变电容，使该设计具有较低的相位噪声和较宽的调谐范围。

Through inductor optimization, the VCO has a low phase noise and a wide tuning range with switched capacitor array and NMOS varactor.

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D/A转换器的设计过程中，主要从精度和速度两个方面做分析，对单位电容和开关阵列进行了设计优化。

The unit capacitor and the switch array are optimized so that the DAC can achieve a better tradeoff between accuracy and speed.

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