A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In ...A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than -107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35 %. The results led to a good oscillator figure of merit of-188 dBc/Hz. The measurement results agreed well with those of the simulations.展开更多
采用45nm SOI CMOS工艺,设计了一种应用于毫米波系统的宽调谐范围VCO。采用具有高Q值且长度可灵活设计的开关耦合传输线(SCTL)作为谐振腔电感,通过控制耦合开关改变传输线的等效感值,在保持低相位噪声、不增加功耗和面积的情况下,提高了...采用45nm SOI CMOS工艺,设计了一种应用于毫米波系统的宽调谐范围VCO。采用具有高Q值且长度可灵活设计的开关耦合传输线(SCTL)作为谐振腔电感,通过控制耦合开关改变传输线的等效感值,在保持低相位噪声、不增加功耗和面积的情况下,提高了VCO的调谐范围。后仿真结果表明,不使用耦合开关的TL-VCO的调谐范围为45.6～57.1GHz(22.4%),SCTLVCO的调谐范围为42.25～59.92GHz(34.6%)。相比TL-VCO,SCTL-VCO的调谐范围增大了53.7%。在整个调谐范围内,相位噪声为-112.1～-120.4dBc/Hz@10 MHz,相应的FOM和FOMT分别为-178.3～-182.6dBc/Hz和-189.1～-193.4dBc/Hz,电源电压为0.7V,VCO核心功耗为8.6～10.8mW,面积为0.005 4mm^2。展开更多
针对无线通信和微机械传感器系统对时钟相位噪声的要求,设计了一种高精度低温漂的振荡器电路设计。利用Leeson线形相位噪声模型分析相位噪声,降低了主要噪声源,达到优化相位噪声的目的。该电路在华润上华0.18μm工艺平台上流片验证。测...针对无线通信和微机械传感器系统对时钟相位噪声的要求,设计了一种高精度低温漂的振荡器电路设计。利用Leeson线形相位噪声模型分析相位噪声,降低了主要噪声源,达到优化相位噪声的目的。该电路在华润上华0.18μm工艺平台上流片验证。测试结果显示,电源电压在2.2~3.6 V变化,温度在-35~85℃变化,频率变化为-2%^+0.5%;相位噪声-116 d Bc@1 k Hz;4 000个周期的抖动在-1.2%^+1.2%。该电路已成功集成到微机械陀螺仪控制芯片中。展开更多
文摘A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than -107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35 %. The results led to a good oscillator figure of merit of-188 dBc/Hz. The measurement results agreed well with those of the simulations.
文摘采用45nm SOI CMOS工艺,设计了一种应用于毫米波系统的宽调谐范围VCO。采用具有高Q值且长度可灵活设计的开关耦合传输线(SCTL)作为谐振腔电感,通过控制耦合开关改变传输线的等效感值,在保持低相位噪声、不增加功耗和面积的情况下,提高了VCO的调谐范围。后仿真结果表明,不使用耦合开关的TL-VCO的调谐范围为45.6～57.1GHz(22.4%),SCTLVCO的调谐范围为42.25～59.92GHz(34.6%)。相比TL-VCO,SCTL-VCO的调谐范围增大了53.7%。在整个调谐范围内,相位噪声为-112.1～-120.4dBc/Hz@10 MHz,相应的FOM和FOMT分别为-178.3～-182.6dBc/Hz和-189.1～-193.4dBc/Hz,电源电压为0.7V,VCO核心功耗为8.6～10.8mW,面积为0.005 4mm^2。
文摘针对无线通信和微机械传感器系统对时钟相位噪声的要求,设计了一种高精度低温漂的振荡器电路设计。利用Leeson线形相位噪声模型分析相位噪声,降低了主要噪声源,达到优化相位噪声的目的。该电路在华润上华0.18μm工艺平台上流片验证。测试结果显示,电源电压在2.2~3.6 V变化,温度在-35~85℃变化,频率变化为-2%^+0.5%;相位噪声-116 d Bc@1 k Hz;4 000个周期的抖动在-1.2%^+1.2%。该电路已成功集成到微机械陀螺仪控制芯片中。
