A Low-Noise Multi-GHz CMOS Multiloop Ring Oscillator With Coarse and Fine Frequency Tuning

作者：Liu Hai Qi^*; Goh Wang Ling; Sick Liter; Lim Wei Meng; Zhang Yue Ping

来源：IEEE Transactions on Very Large Scale Integration Systems, 2009, 17(4): 571-577.

DOI：10.1109/TVLSI.2008.2011206

• CMOS
• coarse/fine tuning
• gigahertz (GHz)
• multiloop
• phase noise
• ring oscillator
• voltage-controlled oscillator (VCO)

A 7-GHz CMOS voltage controlled ring oscillator that employs multiloop technique for frequency boosting is presented in this paper. The circuit permits lower tuning gain through the use of coarse/fine frequency control. The lower tuning gain also translates into a lower sensitivity to the voltage at the control lines. Fabricated in a standard 0.13-mu m CMOS process, the proposed voltage-controlled ring oscillator exhibits a low phase noise of -103.4 dBc/Hz at 1 MHz offset from the center frequency of 7.64 GHz, while consuming a current of 40 mA excluding the buffer.

• 出版日期2009-4
• 单位南阳理工学院