| 一种新颖的正交输出伪差分环形VCO的设计 |
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| 引用本文： | 房军梁,张长春,陈德媛,郭宇锋,刘蕾蕾,方玉明.一种新颖的正交输出伪差分环形VCO的设计[J].南京邮电大学学报(自然科学版),2014(2):100-104. |
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| 作者姓名： | 房军梁 张长春 陈德媛 郭宇锋 刘蕾蕾 方玉明 |
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| 作者单位： | [1]南京邮电大学电子科学与工程学院,江苏南京210023 [2]南京邮电大学江苏省射频集成与微组装工程实验室,江苏南京210023 |
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| 基金项目： | 国家自然科学基金（61076073）、教育部博士点基金（20133223120005,20133223110003）、中国博士后科学基金（2012M521126）、江苏省自然科学基金（BK20130878,BK2012435）、南京邮电大学科研项目（NY211016,NY213145）和南京邮电大学科学技术创新培训计划（SJD2012006）资助项目 |
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| 摘 要： | 设计了一种基于标准0.18 μm CMOS工艺的4级延迟单元的全差分环形压控振荡器.提出了一种新颖的环形振荡器电路结构,通过结合控制耦合强度与改变负载电阻值的方法,改善了单一技术在有限的电压范围内的调谐线性度,实现整个电压范围内的高调谐线性度;采用双通路技术提高了振荡频率,同时运用交叉耦合正反馈减少输出电平翻转时间,改善相位噪声特性,提高性能.后仿真结果表明,在电源电压为1.8V时,VCO的中心频率为2.8 GHz,核心电路的功耗为18.36 mW,调谐范围为2.05 GHz～3.35 GHz,当频率为2.8 GHz时,相位噪声为-89.6 dBc/Hz@1 MHz.
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| 关 键 词： | 环形压控振荡器 双通路 相位噪声 线性度 |
Design of Novel Pseudo-Differential Ring-VCO with I/Q Outputs |
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| FANG Jun-liang,ZHANG Chang-chun,CHEN De-yuan,GUO Yu-feng,LIU Lei-lei,FANG Yu-ming.Design of Novel Pseudo-Differential Ring-VCO with I/Q Outputs[J].Journal of Nanjing University of Posts and Telecommunications,2014(2):100-104. |
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| Authors: | FANG Jun-liang ZHANG Chang-chun CHEN De-yuan GUO Yu-feng LIU Lei-lei FANG Yu-ming |
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| Institution: | 1. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China 2. Jiangsu Provincial Engineering Laboratory of RF Integration and Micro-assembly, Nanjing University of Posts and Telecommunications,Nanjing 210023, China |
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| Abstract: | A four-stage fully differential ring-voltage-controlled oscillator（ring-VCO） is presented based on 0. 18μm CMOS technology. The delay cell is optimized by a combining method for controlling the power of the cross-coupled MOS and modifying the load resistance value. The method can improve the linear character- istics of the circuits. Meanwhile, the dual-delay path technique is used to improve the frequence and a cross coupling positive feedback is used to reduce the transition time of the output. Measurements show that the os- cillators have linear frequency-voltage characteristics over a wide tunning range. At 1.8 V supply voltage, the VCO has a power consumption of 18.36 mW and a output frequence range from 2.05 GHz to 3.35 GHz. The phase noise is -89.6 dBc/Hz at 1 MHz offset from the center frequence of 2.8 GHz. |
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| Keywords: | ring-VCO CMOS dual-delay paths phase noise linearity |
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