Design of K-Band VCO and Research on Bonding-Wire Model

• Main Authors: Cheng-Yu Chiang, 江政育
• Other Authors: 王多柏
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/35zta5

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 99 === In communication systems, voltage-controlled oscillator (VCO) is important building blocks. Therefore, to design a VCO with low phase noise and wide-tuning range is important. In addition, this thesis also research on bonding-wire model for RF circuit applications. In this thesis, a voltage-controlled oscillator is designed and implemented in TSMC 0.18-um CMOS process technology. Thesis research can be divided into four parts. The first part introduces the application of oscillators and discusses the theory of LC-tank VCO. A low voltage, low power and wide-tuning range voltage-controlled oscillator is presented in second part. By employing varactor feedback, the tuning mechanism is extend and improved the phase noise. Based on the proposed architecture, the measured phase noise is -112.53 dBc/Hz at 1-MHz offset from 24.68-GHz oscillation frequency, the oscillation frequency can be varied from 20.53 GHz to 24.68 GHz, and the measured tuning range is 18.34%. Operating at 0.6-V supply voltage, the VCO core consumes 2.28-mW dc power. The overall chip size including the test pad is 665 × 665 um2. The third part discusses errors of measurement in vector network analyzer, and the SOLT calibration kits are used to calibrate it. In the last part, the bonding wire model is developed base on π-model which converted from two-port network. The π-model accurately captures bonding wire characteristics beyond the self-resonant frequency.