| 零中频DVB/DAB/CMMB调谐器中可编程信道滤波器设计 |
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| 引用本文： | 冯筱,文光俊,孙慕明. 零中频DVB/DAB/CMMB调谐器中可编程信道滤波器设计[J]. 电视技术, 2011, 35(19): 30-33 |
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| 作者姓名： | 冯筱 文光俊 孙慕明 |
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| 作者单位： | 电子科技大学RFIC教研室,四川成都,611731 |
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| 摘 要： | 介绍了应用于多模多频(DVB/DAB/CMMB)移动数字电视接收的可编程信道滤波器设计.滤波器采用0.1dB波纹的7阶切比雪夫(Chebyshev)Ⅰ型低通结构,截止频率1.8/2.5/3/3.5/4 MHz可编程,在偏离截止频率1.25/4 MHz的频点上,分别实现26/57 dB衰减.多级直流负反馈环路用于抵消因版...
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| 关 键 词： | 多媒体 模拟基带 可编程信道滤波器 蛙跳技术 |
Design of Programmable Bandwidth Channel-select Filter for ZIF DVB/DAB/CMMB Tuner |
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| FENG Xiao,WEN Guangjun,SUN Muming. Design of Programmable Bandwidth Channel-select Filter for ZIF DVB/DAB/CMMB Tuner[J]. Ideo Engineering, 2011, 35(19): 30-33 |
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| Authors: | FENG Xiao WEN Guangjun SUN Muming |
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| Affiliation: | FENG Xiao,WEN Guangjun,SUN Muming (RFIC Lab,University of Electronic and Science Technology of China,Chengdu 611731,China) |
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| Abstract: | The layout simulated results of an variable gain and programmable bandwidth filter in analog baseband chain for mobile and multimedia applications in 0.13 μm SiGe BiCMOS process are presented.A programmable 7th-order Chebyshev low pass filter(LPF) with calibration circuit is used in the analog baseband chain,and the programmable bandwidth is 1.8/2.5/3/3.5/4 MHz with an attenuation of 26/57 dB at offsets of 1.25/4 MHz.Design trade-offs are carefully considered in designing the filter circuit,and the multi-stages DC offset cancellation loop is used to remove the DC offset which caused by self-mixing.Implemented in a 0.13 μm SiGe technology with 0.4 mm2 die size,this filter achieves IIP3 of 23.16 dBm and dissipate 12.2 mA under 2.5 V supply. |
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| Keywords: | CMMB analog baseband programmable gain channel-select filter programmable gain amplifier |
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