| 基于802.11a标准的CMOS正交调制器和上变频器 |
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| 引用本文： | 李文渊,王志功,毛银伟.基于802.11a标准的CMOS正交调制器和上变频器[J].半导体学报,2007,28(9). |
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| 作者姓名： | 李文渊 王志功 毛银伟 |
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| 作者单位： | 东南大学射频与光电集成电路研究所,南京,210096 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用0.18μm CMOS工艺,设计并实现了应用于WLAN IEEE 802.11a的正交调制器和上变频器.正交调制器在传统的Gilbert单元基础上,采用负反馈跨导放大器来提高线性度;上变频器采用LC谐振网络作混频器负载来提高增益和电压输出摆幅.测试结果表明,在1.8V电源电压下,谐振频率点的1dB压缩点P1dB为-3.6dBm,功率转换增益为-3.6dB,电流消耗大约45.8mA.
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| 关 键 词： | 射频集成电路 CMOS工艺 正交调制器 上变频器 Gilbert单元 |
CMOS Quadrature Modulator and Up-Conversion Mixer for 802. 11a Wireless LAN Systems |
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| Li Wenyuan,Wang Zhigong,Mao Yinwei.CMOS Quadrature Modulator and Up-Conversion Mixer for 802. 11a Wireless LAN Systems[J].Chinese Journal of Semiconductors,2007,28(9). |
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| Authors: | Li Wenyuan Wang Zhigong Mao Yinwei |
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| Abstract: | A quadrature modulator and an up-conversion mixer for an 802. 11a wireless LAN system are designed and fabricated in 0.18μm gate length standard CMOS technology. A current feedback loop with a transconductor is used to improve the linearity of the quadrature modulator;An LC resonant tank is used as the load of the upconversion mixer to improve its gain and increase the voltage swing. The measurement results show that the input P1dB achieves - 3.6dBm, the transducer power gain of the circuit is - 3.6dB, and the current consumes about 45.8mA with a 1.8V power supply. |
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| Keywords: | RFIC CMOS technology quadrature modulator up-conversion mixer Gilbert cell |
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