半导体学报2011，Vol.32Issue(11)：82-87,6.DOI:10.1088/1674-4926/32/11/115003
LC voltage controlled oscillator in 0.18-μm RF CMOS
LC voltage controlled oscillator in 0.18-μm RF CMOS
摘要
Abstract
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 μm2.It can be used in the IEEE802.1lb based wireless local network receiver.关键词
VCO/ phase noise/ Q-factor/ load impedance/ switched capacitor arrayKey words
VCO/ phase noise/ Q-factor/ load impedance/ switched capacitor array引用本文复制引用
Li Wenyuan,Li Xian,Wang Zhigong..LC voltage controlled oscillator in 0.18-μm RF CMOS[J].半导体学报,2011,32(11):82-87,6.基金项目
Project supported by the Scientific and Technologic Cooperation Foundation of the Yangtxe River Delta Area of China (No.2008C16017). （No.2008C16017）
