正交输出、双调谐、高性能4.488GHz环形振荡器设计

Quadrature Output,Dual Tuning,High FOM 4.488GHz Ring Oscillator

设计了一个4级延迟单元的环形振荡器,通过采用2条辅助通路结构,实现了振荡器的双调谐功能和高的FOM(figure of merit)值.设计采用Jazz 0.18μm CMOS工艺,在1.6 V电源电压下的电流消耗为18.98mA.后仿真结果显示,VCO输出中心频率和增益分别为4.488 GHz和147 MHz/V,频率粗调谐范围为1.42GHz.频偏1 MHz处的相位噪声为-104.3 dBc/Hz.在频偏1 MHz和5 MHz处FOM值分别为169.1和173.39.

A four-stage voltage-controlled oscillator is designed.With two auxiliary feed-forward loops, the designed VCO achieves dual tuning function and high FOM.Jazz 0.18 μm CMOS technology is implemented.The current of the VCO is 18.98 mA under a supply voltage of 1.6 V.Post simulation results show that the coarse tuning range covers 1.42 GHz with center frequency 4.488 GHz while the gain is only 147 MHz/V.The Phase noise of the VCO is-104.3 dBc/Hz at 1 MHz offset.The corresponding FOM at 1 MHz offset and 5 MHz o...