| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 96 === Based on devices model of Taiwan Semiconductor Manufacturing Company (TSMC) 0.18μm RFCMOS process technology, the theory and simulation of Voltage- Controlled-Oscillators (VCOs) with on-chip inductor and capacitor integrated circuits are studied herein, and the analysis and further discussion to the optimization of the circuit are presented therefore.
Firstly, this thesis briefly introduces the fundamental theory of different kinds of oscillators. Secondly, the power comsumption and phase noise model are raised to the VCO circuit. Then we focus on the low supply voltage as a starting point to propose and recommend several kinds of circuitries to achieve the minimum supply voltage technology of LC VCO circuits. The fundamental physics of LC oscillator with PMOS cross coupled pair LC VCO is chosen and analyzed in detail in this paper. The design procedures of LC-VCO circuit and optimization schemes are presented.
Then, focusing on the radio frequency identiftcation (RFID) application to stretch into microwave identiftcation including to 2.45-5.8GHz bands, the Agilent ADS RF simulator and TSMC 0.18μm RFCMOS model are adopted to prevail the VCO integrated circuit design. According to the designed VCO circuits, the low power comsumption and low supply voltage consideration are used for VCO circuit optimization as the key performance indexes by tuning frequency range and phase noise. The VCO is therefore designed and produced via Nation Chip Implement Center (CIC) foundry shuttle.
The final results show than the tuning range in 7.6% and phase noise at -117dBc @1MHz at tested frequency in 1.95GHz under 0.6V supply voltage and power consumption in 1.44mW are achieved.
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