O te hangarau, Hikohiko
He aha e nga transistors o te ara iahiko
Mai te transistor pourua ko te aronui e toru-ira, i reira e toru ara taea o tae atu te reira i roto i te ara iahiko hiko ki te kokoru noa me te kāpeka putanga:
- he turanga noa (pūkete) - ngaohiko nui te tuku whakarea;
- he-kaituku noa (MA) - he tohu rahi roa'tu, rite te nāianei, me te ngaohiko;
- noa-kaikohi (OC) - roa'tu, tohu o nāianei.
Scheme turanga noa ko tetahi o toru whirihoranga angamaheni whakauru transistors pourua. Ko te tikanga te whakamahia te reira rite te tīwerawera moka o nāianei ngaohiko ranei. E āhuatanga taua transistors o te ara iahiko i roto i e te kaituku i konei mahi rite te ara iahiko tāuru, tangohia te he tohu putanga i te kaikohi me turanga "tangata whenua" ki te waea noa. He whirihoranga rite he iahiko whakawhitinga FET i roto i amplifiers kuwaha noa.
tawhā | kīanga |
Koeff.usileniya nāianei | k ahau / ahau i roto i = k ahau / ahau e = α [α < 1] |
Bx. ātete | R i = U i roto i / ahau i roto i = kia U / Ie |
transistors whakawhitinga Aronui ON rerekē pāmahana me te auau āhuatanga pūmau e whakarato he fakafalala iti o te tawhā (ngaohiko taonga, o nāianei, tāuru parenga ia) i te pāmahana o te tikanga taiao mahi. Ko te huakore ngā te taiawhio iti R IN me te ngaro o te amplification nāianei.
whakarato Scheme kaituku noa te tiketike rawa taonga, me te hua te tohu putanga kōaro, e kia whai i te rerekētanga tika nui. tuku tau whakarea i roto i tenei kaupapa nuinga tei runga i te pāmahana o te nāianei rītaha, ai ko ahua ohorere te taonga tūturu. Ēnei transistors whakarato iahiko whakawhitinga nui bx R, te whakarea hoki o nāianei, me te ngaohiko amplification, Kōaro tohu kōkuhu, haratau whakaurunga. Ko te huakore Ko nga raruraru e pā ana ki te e akiakina - taea o noa urupare pai distortion puta hoki tohu iti e tika ana ki te tāuru iti ngā hihiri.
tawhā | kīanga |
Tūwehe. amplification nāianei | Ahau i roto i / ahau i roto i = k ahau / ahau b = ahau k / (ahau e au k) = α / ( 1-α) = β [β >> 1] |
Bx. ātete | R i = U i roto i / ahau i roto i = kia U / ahau b |
Scheme tango noa (mohiotia ano i roto i te hikohiko hei akonga kaituku) ko tetahi o toru momo o transistors o te ara iahiko. Te reira i te tohu tāuru tukua mā te mekameka turanga, ka nekehia atu te te putanga i te iahiko i roto i te ara iahiko kaituku o te transistor. he whirihoranga taua o te atamira tīwerawera te tikanga e whakamahia ana hei moka ngaohiko. Here te turanga o te transistor tavini rite te ara iahiko tāuru, tona kaituku he putanga,, me te te kaikohi te wāhi noa, i konei te kaupapa ingoa. Analogs taea te mahi rite iahiko whakawhitinga FETs ki te putanga noa. Ko tino te painga o tenei tikanga tāuru nui parenga ia tīwerawera atamira me te putanga āhua iti.
tawhā | kīanga |
Tūwehe. amplification nāianei | Ahau i roto i / ahau i roto i = ahau e / ahau b = e / ahau (ahau ī k au) = 1 / (1-α) = β [β >> 1] |
Koff. ngaohiko taonga | U atu / U i roto i = U Re / (U e + U Re) < 1 |
Bx. ātete | R i = U i roto i / ahau i roto i = kia U / Ie |
Kei te whānui iahiko whakawhiti transistors toru katoa angamaheni whakamahia i roto i te circuitry, i runga i te ūnga o te pūrere hiko me te taiao o tona tono rānei.
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