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LC voltage controlled oscillator in 0.18-μm RF CMOS

LC voltage controlled oscillator in 0.18-μm RF CMOS
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摘要 An integrated low-phase-noise voltage-controlled oscillator (VCO) has been designed and fabricated in SMIC 0.18 μm RF CMOS technology. The circuit employs an optimally designed LC resonator and a differential cross-coupling amplifier acts as a negative resistor to compensate the energy loss of the resonator. To extend the frequency tuning range, a three-bit binary-weighted switched capacitor array is used in the circuit. The testing result indicates that the VCO achieves a tuning range of 60% from 1.92 to 3.35 GHz. The phase noise of the VCO is -117.8 dBc/Hz at 1 MHz offset from the carrier frequency of 2.4 GHz. It draws 5.6 mA current from a 1.8 V supply. The VCO integrated circuit occupies a die area of 600 × 900 μm^2. It can be used in the IEEE802.1 lb based wireless local network receiver. An integrated low-phase-noise voltage-controlled oscillator (VCO) has been designed and fabricated in SMIC 0.18 μm RF CMOS technology. The circuit employs an optimally designed LC resonator and a differential cross-coupling amplifier acts as a negative resistor to compensate the energy loss of the resonator. To extend the frequency tuning range, a three-bit binary-weighted switched capacitor array is used in the circuit. The testing result indicates that the VCO achieves a tuning range of 60% from 1.92 to 3.35 GHz. The phase noise of the VCO is -117.8 dBc/Hz at 1 MHz offset from the carrier frequency of 2.4 GHz. It draws 5.6 mA current from a 1.8 V supply. The VCO integrated circuit occupies a die area of 600 × 900 μm^2. It can be used in the IEEE802.1 lb based wireless local network receiver.
出处 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2011年第11期82-87,共6页 半导体学报(英文版)
基金 supported by the Scientific and Technologic Cooperation Foundation of the Yangtxe River Delta Area of China(No.2008C16017)
关键词 VCO phase noise Q-factor load impedance switched capacitor array VCO phase noise Q-factor load impedance switched capacitor array
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