一种低功耗自动增益控制集成石英振荡器  

Automatic Gain Controll Integrated Quartz Oscillator With Low Power

作　　者：谢海情[1] 王龙 陈玉辉 李洁颖 肖海鹏 王振宇 曾承伟 XIE Haiqing;WANG Long;CHEN Yuhui;LI Jieying;XIAO Haipeng;WANG Zhenyu;ZENG Chengwei(School of Physics&Electronic Science,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学物理与电子科学学院,湖南长沙410114

出　　处：《压电与声光》2018年第6期905-909,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61404011);湖南省自然科学基金资助项目(2015JJ3001);湖南省教育厅资助科研基金资助项目(17B007)

摘　　要：通过分析三点式振荡器的结构原理,选取桑托斯(Santos)结构,利用非对称差分对的电流分配特性实现幅度控制,以降低功耗。采用反相器链整形满摆幅输出,设计了一种适用于无线接收芯片的12 MHz自动增益控制晶体振荡器。基于和舰(HJ)射频(RF)0.18μm CMOS工艺,完成电路设计、版图设计与仿真,流片并测试。结果表明,该晶体振荡器的总电流为120μA,相位噪声为-121dBc/@1kHz,-165.1dBc/@1 MHz,满足无线接收芯片的性能指标。A kind of 12 MHz automatic gain control crystal oscillatorsuitablefor wireless receiver chip was designed based on the Santos structure by analyzing the principle of three-point oscillator structure.In this oscillator circuit,the amplitude control was achieved by using the asymmetric difference pair current distribution characteristic to reduce the power consumption,and the inverter chain was adopted to shape the full-swing output.Based on the HJ RF 0.18μm CMOS process,the circuit design and layout design as well as the simulation were accomplished,and the tape-out and test were also carried out.The results indicated that the total current of oscillator was 120μA,phase noise was-121 dBc/@1 kHz,-165.1 dBc/@1 MHz,respectively,which met the specifications of wireless receiver chip.

关 键 词：石英晶体振荡器 自动增益控制 功耗 相位噪声 CMOS集成 

分 类 号：N431.1[自然科学总论]