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摘 要:采用中芯国际180 nm混合信号工艺,设计了一种新型低压低功耗环形振荡器.基于反馈理论,采用放大器完成从电源电压到环振工作电压的降压稳压转换,实现环振工作电压稳定性优化,同时降低其功耗;环振输出经幅度变换电路,实现高摆幅振荡信号输出;振荡器工作频率电流受控,抑制了电源噪声,降低了电源电压波动对输出频率的影响.结果表明,1 V电源电压下,输出频率2.737 MHz,功耗约0.8 μW,1 MHz频点处相位噪声-108.7 dB;0.9~2.1 V电压范围内,输出频率波动小于0.23%,适于无源芯片设计.
关键词:振荡器;射频识别;低电压;低功耗
中图分类号:TN495 文献标志码:A
A Novel Low-voltage Low-power Oscillator Used for Passive RFID
CHEN Diping1,YANG Cuiling1,DONG Gang1,QIN Pengju2,ZENG Jianping1
;low-voltage;low-power
射頻识别:558—561.
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