| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 95 === The object of this thesis is to study and implement the VCO and ILFD, which are the main components in the synthesizer. We implement three VCOs and two ILFDs in this thesis.
In VCO1, we use the symmetric 3-D inductor to implement the tapped inductor in the LC tank. We also use tail current-shaping technique to improve performance. The output frequency is 4.79GHz, phase noise at 1MHz frequency offset is -102.57dBc/Hz, FOM is -175.34 and tuning range is 320MHz. We use the complementary Colpitts structure and the noise-shifting technique to implement the VCO2. The output frequency is 3.64GHz, phase noise at 1MHz frequency offset is -120.57, FOM is -185.89 and tuning range is 490MHz. The structure of VCO3 is the same as VCO2 but with different process technology. In VCO3, the output frequency is 2.44GHz, phase noise at 1MHz frequency offset is -105.65, FOM is -163.4 and tuning range is 380MHz.
In ILFD1, the inductor of LC tank is the tapped inductor implemented by helical inductor. The measured locking range is 3.84~5.15GHz with -3dBm of injection power. The measured locking range of ILFD2 is 5.5~7.9GHz with -3dBm of injection power.
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