zhōng pín
意思解释:(Intermediate frequency)高于低频、低于高频的电磁振荡,其范围一般是10-550千周。在超外差式收音机中,由收音机本身产生的振荡和接收到的高频混合而取得中频。
在超外差收音机中,把射频信号变成预定信号,以便放大,这个预定信号称作中频。1955年1月《无线电》第1期:“外来信号是很微弱的高频电流进入收音机后,不能直接使扬声器或耳机发音。经变频器变成一个固定的频率(叫做中频,通常用…
In superheterodyne radio, become radio frequency signal book signal, so that magnify, this books signal to call intermediate frequency. In January 1955 radio the 1st period: Cling to Yu green lotus root climbs Long of of Gu of Si of archives of sip of mother of Xi of choke Qi ⑷ to look for benzene of Pie of barren of of Meng Xi to mail of heart of natrium of ǖ of pool of post Yu of tip of Su of Yang of Gan Deng of of > of Dian of ⒁ of of of Fu of dice of of few the blade of a sword to be called intermediate frequency, use normally...
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