基于移动数字电视应用的宽带可变增益LNA设计  

Design of Wideband Gain-variable LNA Based on Mobile Digital TV Applications

作　　者：刘学敏[1] 杨拥军[1] 文光俊[1] 

机构地区：[1]电子科技大学通信与信息工程学院射频集成电路研究室,四川成都611731

出　　处：《电视技术》2011年第7期36-40,共5页Video Engineering

基　　金：省部产学研结合项目(2009A090100019)

摘　　要：提出了0．13μmCMOS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1．4～1．8GHz，LNA增益范围为13～38．5dB，NF〈2．7dB，11P3=3．605dBm。该设计较好地实现了多标准下LNA宽带可变增益性能。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.

关 键 词：LNA 宽带 可变增益 线性度 

分 类 号：TN46[电子电信—微电子学与固体电子学]