信息与电子工程2012，Vol.10Issue(3)：274-277,281,5.
超高频段高镜像抑制滤波器的研究实现
Implementation of high image suppression filter with UHF
摘要
Abstract
In Digital Terrestrial Television(DTT) tuner, a circuit system with the superposition of a trapped wavelet filter and a double tuning tracking filter is designed to solve the problem of signal distortion caused by the image frequency falling in the low band and insertion loss due to the single conversion slrurture. Setting the trapped wavelet frequency at the mirror frequency, the filter circuit not only restrains the UHF band at the mirror frequency (image suppression up to 50 dB or above) effectively and restrains the harmonic interference to a certain extent, but also reduces the insertion loss, therefore improves the useful signal gain (the actual signal gain reaches 3 dB above).关键词
双调谐跟踪滤波器/陷波滤波器/镜像抑制Key words
double-tuning tracking filter/ trapped wavelet filter/ image suppression分类
电子信息工程引用本文复制引用
曾孝平,赵宇,熊东,杨学敏,王峰..超高频段高镜像抑制滤波器的研究实现[J].信息与电子工程,2012,10(3):274-277,281,5.基金项目
重庆市重大专项资助项目(CSTC.2010ab2004)) （CSTC.2010ab2004）
