Lub Ntsiab Cai Ntawm Qhov Nruab Nrab Nruab Nrab Transformer Thiab Dab Tsi Yog Nws Txoj Haujlwm Tseem Ceeb

Cov zaus hloov pauv nruab nrab (feem ntau paub tias yog ib nrab voj voog) yog qhov hloov pauv tshwj xeeb nrog tsau hluav taws xob txuas nyob hauv xov tooj cua superheterodyne transistor, tab sis qhov hluav taws xob txuas hluav taws xob tuaj yeem hloov kho tau zoo hauv qee qhov txwv kom ua tiav qhov tsis muaj kev cuam tshuam resonant zaus (465kHZ) tom qab txuas nrog lub Circuit Court. Kev kho kom raug yog ua tiav los ntawm kev hloov chaw txheeb ze ntawm cov tub ntxhais sib nqus. Nws lub tswv yim yog IF hloov pauv hauv xov tooj cua. Feem ntau ntawm lawv yog hom monotonic harmonic, nrog cov qauv yooj yim thiab qhov chaw me me. Vim tias cov tswv yim qis thiab tso tawm qhov cuam tshuam ntawm transistor, txhawm rau txhawm rau ua kom cov hloov pauv nruab nrab nruab nrab ua kom haum cov tswv yim thiab tso tawm qhov tsis txaus ntseeg ntawm transistor, thawj zaug muaj cov kais dej thiab muaj me me ntawm kev hloov thib ob txuas txuas. Kev kho ob zaug muaj qhov zoo ntawm kev xaiv tau zoo thiab dav dav, uas feem ntau siv hauv cov xov tooj cua ua tau zoo. Transistor cov xov tooj cua feem ntau siv ob-theem IF cov tshuab hluav taws xob, yog li peb qhov nruab nrab nruab nrab qhov xav tau los ua ob khub thiab xa cov teeb liab pem hauv ntej thiab tom qab. Lub voj voog nruab nrab hauv qhov Circuit Court feem ntau yog sawv cev los ntawm cov cim bz1, bz2 thiab bz3. Lawv txoj haujlwm hauv Circuit tsis tuaj yeem hloov pauv ntawm qhov xav tau.