A Complementary Colpitts Voltage Controlled Oscillator Implemented with Ring Inductor and Dual Band CMOS Complementary Colpitts Voltage Controlled Oscillator

• Main Authors: Chun-Yuan Chiu, 邱俊元
• Other Authors: Sheng-Lyang Jang
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/88939518911543029033

碩士 === 國立臺灣科技大學 === 電子工程系 === 95 === This thesis is mainly composed of three topics. First, we present a novel differential voltage controlled oscillator (VCO) with high figure of merit. The VCO is composed of two single-ended complementary Colpitts LC VCOs coupled by two identical inductors and is implemented in 0.18μm CMOS technology with 1.5V supply voltage. This differential VCO operates at 5.76 GHz ~6.76 GH. The phase noises of the VCO operating at 6.29GHz are -122.4 dBc/Hz at 1MHz offset while the VCO draws 3.75 mA and 5.625 mW consumption from a supply voltage of 1.5V. Secondly,A new fully integrated, dual-band CMOS voltage controlled oscillator (VCO) is presented. The VCO is composed of two complementary Colpitts VCOs and is implemented in 0.18μm CMOS technology with 2 V supply voltage. The circuit allows the VCO to operate at two resonant frequencies with a common LC tank. This VCO is configured with 2.4 GHz and 5.2 GHz frequency bands with differential outputs. The dual-band VCO operates at 2.39 GHz ~2.68 GH and 4.84 GHz ~5.58 GHz. The phase noises of the VCO operating at 2.4 GHz and 5.13 GHz are -121.11 and -111.76 dBc/Hz at 1MHz offset, respectively, while the VCO draws 7.45/5.92 mA and 14.9/11.84 mW consumption at high/low frequency band from a 2 V supply. And finally, This half-quarter distributed voltage controlled oscillator operates at 4.72 GHz ~5.13 GHz. The phase noises of the VCO operating at 4.89GHz are -115 dBc/Hz at 1MHz offset while the VCO draws 13.09 mA consumption 18.32mW from a supply voltage of 1.4V.