A 20MHz Low Phase-Noise 0.35μm CMOS Crystal Oscillator

• 作 者: 耿建强 兰家隆
• 机 构: School of Electronic Engineering, University of Electronic Science and Technology of China Chengdu 6
• 出 处: Journal of Electronic Science and Technology of China
• 发表日期: 2005年02期
• 关键词: oscillator transistor viewpoint capacitance oscillation resonator offset drain p

The design procedure of a CMOS process integrating Colpitts cr ystal oscillator is described in detail by using the tools of Matlab and advanced design system (ADS). The small-signal analysis is performed both in the viewpoint of negative resistance and positive feedback. The analysis of condition for reliable start-up of oscillation and design guides for low phase noise is introduced. The measured phase noise is ?172dBc/Hz@10 kHz and the power dissipation is 0.36 mW at power supply 3V.

The design procedure of a CMOS process integrating Colpitts cr ystal oscillator is described in detail by using the tools of Matlab and advanced design system (ADS). The small-signal analysis is performed both in the viewpoint of negative resistance and positive feedback. The analysis The condition for reliable start-up of oscillation and design guides for low phase noise is introduced. The measured phase noise is? 172 dBc / Hz @ 10 kHz and the power dissipation is 0.36 mW at power supply 3V.