A low-noise low-power 4.6-GHz CMOS VCO with coupling effect reduced inductors

作者：Liou W R^*; Chen T H; Yeh M L; Ho J J

来源：International Journal of Electronics, 2007, 94(2): 107-121.

DOI：10.1080/00207210601061258

• voltage control oscillator
• phase noise
• wireless LAN
• radio frequency
• MOS varactor

A fully integrated low phase noise 4.6-GHz voltage-controlled oscillator (VCO) is presented for low-voltage high-frequency wireless local area network (LAN) front-end system applications. The VCO is based on a differential negative resistance oscillator with the tail current source replaced by an inductor. The inductor improves the phase noise of the oscillator and enables maximum voltage swing over the tank. A high-performance inductor with unclosed-loop guard ring is designed and used in this VCO design. The differential voltage-controlled oscillator is fabricated in a TSMC 0.18-mu m one-poly-six-metal 1.5 V mixed signal radio frequency (RF) process. The measurement results show a power consumption of 4.3 mW. The phase noise is - 91 dBc/Hz and - 115 dBc/Hz at 100 KHz and 1 MHz offset from the carrier frequency, respectively.

• 出版日期2007-2
• 单位中国科学院电工研究所