Tsawg tso zis impedance yog xav kom nqus qhov siab tshaj plaws tam sim no los ntawm Circuit Court. High impedance txhais tau hais tias lub voj voog rub lossis muab lub zog me me rau lub teeb liab. Tsawg impedance txhais tau tias lub voj voog rub lossis muab lub zog ntau dua rau lub teeb liab… lub piezo mic yuav xav tau 50k input impedance kom tau ze rau lub microphone impedance.
Dab tsi yog qhov tso zis zoo impedance?
Ib tus kws tshaj lij lossis "zoo" mic tso zis impedance yog nyob rau hauv thaj tsam ntawm 50 Ω - 500 Ω, txawm tias qee cov mics pro muaj impedances me ntsis sab nraum qhov no. Tsuav yog qhov tso zis impedance qis dua (1/10th lossis tsawg dua) tshaj qhov load impedance, nws yog qhov zoo!
Yim impedance txhais li cas?
Tsawg impedance yog nyob rau hauv ntau ntawm kwv yees li 4 txog 16 ohms. Tsawg impedance hais lus yog siv nyob rau hauv ntau lub suab xws li tsev neeg lub tso suab system thiab lub tsheb suab system. Siab impedance feem ntau txhais tau tias impedance ntawm ob peb-pua ohms mus rau ntau-k ohms.
Nws puas zoo rau muaj qhov tso zis siab impedance?
The siab impedance kom ntseeg tau tias nws nqus tam sim no me ntsisNws yog lub tshuab ua haujlwm ua haujlwm los hloov lub zog qis, hluav taws xob-tsav cov teeb liab mus rau qhov siab dua-voltage tso zis teeb liab. Tsawg impedance circuits tuaj yeem ua rau muaj kev phom sij vim tias muaj qhov siab tam sim no uas lawv tsim. Op amps zam qhov no los ntawm kev muaj cov tswv yim impedance siab heev.
Yuav ua li cas yog tias input impedance qis dhau?
Nyob ntawm qhov tsav tsheb thauj khoom, qhov siab dua lossis qis dua input impedance yuav ua rau lub tshuab tsav tsheb nkim ntau lossis tsawg zog sab hauv Lo lus "siab input impedance" yog ib txwm muaj feem xyuam mus rau lub amplifier (suab intermediate zaus fais fab amplifier… thiab lwm yam.)
