| 基于移动数字电视应用的宽带可变增益LNA设计 |
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| 引用本文： | 刘学敏,杨拥军,文光俊. 基于移动数字电视应用的宽带可变增益LNA设计[J]. 电视技术, 2011, 35(7): 36-40 |
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| 作者姓名： | 刘学敏 杨拥军 文光俊 |
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| 作者单位： | 电子科技大学通信与信息工程学院射频集成电路研究室; |
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| 基金项目： | 省部产学研结合项目(2009A090100019) |
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| 摘 要： | 提出了0.13 μm CMOS工艺下可兼容多标准DVB-H/DAB/CMMB的移动数字电视调谐器射频前端双通道LNA设计。在UHF频段和L波段下,设计分别采用片上balun电路、双交叉耦合技术、开关转换电路、伪差分电路等技术以达到LNA宽带匹配、可变增益、低NF及高线性度的指标要求。版图后仿真结果显示:在UHF频段,仿真频率范围为470~860MHz,LNA增益范围为14.7~38.8dB,NF<2.4dB,IIP3=1.979dBm;在L波段,仿真频率范围为1.4~1.8 GHz,LNA增益范围为13~38.5 dB,NF<2.7 dB,IIP3=3.605 dBm。该设计较好地实现了多标准下LNA宽带可变增益性能。
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| 关 键 词： | LNA 宽带 可变增益 线性度 |
Design of Wideband Gain-variable LNA Based on Mobile Digital TV Applications |
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| LIU Xuemin,YANG Yongjun,WEN Guangjun. Design of Wideband Gain-variable LNA Based on Mobile Digital TV Applications[J]. Ideo Engineering, 2011, 35(7): 36-40 |
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| Authors: | LIU Xuemin YANG Yongjun WEN Guangjun |
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| Affiliation: | LIU Xuemin,YANG Yongjun,WEN Guangjun (RFIC Lab. CICS,School of Communication and Information Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China) |
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| Abstract: | In this paper, two sets of LNA in the frequency range of UHF and L-band implemented in 0.13 μm CMOS technology are presented to support the digital TV standards DVB-H/DAB/CMMB. To meet the needs of digital TV application, the on-chip balun circuit, controllable resistors, DCC technology and FDA amplifier are adopted to achieve the good performance on input-match, variable gain, NF and linearity. Post-simulations show that in the frequency range of 470~860 MHz, the LNA achieves maximum gain 38.8 dB, lowest gain 14.7 dB, noise figure lower than 2.4 dB and IIP3 1.979 dBm, while in the frequency range of 1.4~1.8 GHz, the LNA achieves maximum gain 38.5 dB, lowest gain 13 dB, noise figure lower than 2.7 dB and IIP3 3.605 dBm. |
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| Keywords: | low-noise amplifier wideband variable gain tuner mobile digital TV |
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