檢視中频信号的原始碼

[[File:中频信号.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E4%B8%AD%E9%A2%91%E4%BF%A1%E5%8F%B7%20%20%E6%90%9C%E7%8B%90&step_word=&hs=0&pn=2&spn=0&di=38720&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=847326817%2C2009920786&os=1682534069%2C2472900475&simid=3479934311%2C291885042&adpicid=0&lpn=0&ln=356&fr=&fmq=1632521194732_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20171026%2Fb7cc2276efc349b2a1bee460ffd54399.jpeg%26refer%3Dhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1635113443%26t%3D8c2697311f1ec9d03106fefe2c9af3d6&fromurl=ippr_z2C%24qAzdH3FAzdH3F4p_z%26e3Bf5i7_z%26e3Bv54AzdH3FtpAzdH3FrAzdH3Fdaanldb80_0b8nnn&gsm=3&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined 原图链接][https://www.sohu.com/a/200392817_781333 来自搜狐]]]
'''中频信号'''是高频信号经过变频而获得的一种信号.为了使放大器能够稳定的工作和减小干扰.一般的接收机都要将高频信号变为中频信号.电视机的图像中频信号是38MHz.音频的中频信号是6.5MHz.<ref>[https://baijiahao.baidu.com/s?id=1652169759525523073&wfr=spider&for=pc 关于射频芯片，看这一篇就够了！（干货收藏）]杨江凯</ref>