Band switch control apparatus for intermediate frequency filter
作者： Yasuji Saito , Masaya Suto
DOI:
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摘要: A band-switch control apparatus for an intermediate-frequency filter comprising: adjacent interference-signal detecting unit interference-signal, having a frequency to the desired frequency, superimposed on reception signal tuned frequency; modulation-degree modulation degree of signal; bandwidth selecting pass corresponding amplitude interference-signal; and band-narrowing suppression lower limit value demodulation degree, passing, with variable bandwidth, obtained by converting signal, changing selected value, if is smaller than value.
lens.org 参考文章(17)
Brian William Kroeger, Adjacent channel interference mitigation for fm digital audio broadcasting receivers ,(2003)
John Elliott Whitecar, J. William Whikehart, Nicholas Lawrence Difiore, Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections ,(1997)
Junsong Li, Radio receiver having a variable bandwidth IF filter and method therefor ,(2002)
Ali S. Khayrallah, Jiann-Ching Guey, Method and apparatus for combating adjacent channel interference using multiple if filters ,(1999)
Raed S. Shatara, Zbigniew Szydlowski, Radio reception apparatus and method for the control of a radio reception apparatus ,(2000)
Shuichi Kuroda, Masaru Fukusen, Automatic tuning apparatus for filter and communication instrument ,(2004)
Nicholas Cowley, Ali Isaac, Frequency change arrangement and radio frequency tuner ,(2006)
Kaveh Kianush, Jacobus Cornelis Sandee, Fm receiver with bandwidth control means ,(2000)
Dong-Uk Seo, Tuning method and apparatus for reducing interference between adjacent channels ,(2005)
Yasuji Saito, Masaaki Taira, Yutaka Hirakoso, Signal processing circuit for tuner which applies signal processing based on variation in frequency of intermediate frequency signal ,(2004)