Digital-ki-tairitenga converter: whakaahuatanga, te mau parau tumu whakahaere, tono.

Kei te āhuatanga e te maha o ngā tawhā hangarau, tetahi o nei ko tohu tairitenga te auau oscillation. Hei tauira, ka taea e te taringa tangata whakarongo ki te tohu he auau i roto i te whānui i te 1 ki te 22 kHz, a kei roto i te marama kitea he auau whanganga i roto i te pirioni Hertz. He tauira o te tohu orotahi taea te mahi rite te tuhi record pāpuoru. Photos, pango me te ma i te tuatahi, a ka, me te tae - he hoki he tauira o te tuhi tohu tairitenga.

Digital-ki-tairitenga converter ko tata tonu tika i muri i te kaitahuri tairitenga-ki-mamati (ADC), i te mea pai ki te mea i te kupu torutoru, e reira ko he raruraru mārama faatiti'aifarohia e te e te pūrere i raro i whiriwhiria e tatou.

ADC tahuri te tohu tairitenga ki mamati. Ko te tikanga te maha o e hāngai ki te uara tohu i te wa o te ine, he waehere ā-rua. whakamana ia inenga te ki te tetahi auau, ka karanga te auau tīpako.

Kei te takahi tāia te auau tīpako iti e whakarato ana whakaora tohu ruri. Tenei tohu e kore distortion me te whakahoki i te putanga o te mamati ki pūtahuri tohu tairitenga. kia quantizing auau tahuri i te iti rawa e rua auau mōrahi tohu. Hei tauira, mō te huringa o te ruri tohu tangi auau feunga quantization rite ki te 44 kHz.

Na ko reira mārama e te kaitahuri mamati-ki-tairitenga ko i te raupapa tāuru o waehere ā-rua, e kia tahuri ai ki te tohu tairitenga hāngai.

E ngā tika Whakahaere me te ora mahi ano i roto i te whika, engari e kore e enei tawhā whakawhirinaki i runga i te parau tumu whakahaere o te DAC, engari i te wāhanga me te hanga kounga. Ahakoa o DACs parau tumu panoni e kitea e ngā āhuatanga pērā i te whānuitanga hihiri, te pū faafariuraa me ngā tawhā wā.

whakaritea te whānuitanga hihiri te mo te tāuru DAC me putanga, kia rite ki te ōwehenga o te uara mōrahi o te tāuru (putanga) ki te wāhi iti (putanga) uara.

Ko tētahi o nga tawhā taima ko te kōaro o te tīpako auau, wā i huaina quantization. Kei te matau te reira e āta tenei uara te ADC, mā i kua i te tohu kua tahuri ki DAC.

Ko te rahinga taketake characterizing te tere o te DAC ko te wa faafariuraa. Here to tatou ki te whiriwhiri i waenganui i te whakanui ake i te faafariuraa - DACs tika ake, engari iti iho i te i tona tere, a hurihia.

A feruri i te tahi mau parau tumu o te tahuri "mamati-ki-tairitenga", kahore hoatu tātai me kaupapa. He parau tumu faafariuraa e rua - rangatū me te whakarara.

Ko te raupapa o waehere mamati i te wāhi o mamati-ki-tairitenga converter tahuri te raupapa o ngātere tapawhā i te putanga. He whanui he pini, me te āputa muri ki reira i te aroaro o te pini muri kei te takoto i runga i te waehere ā-rua hou. No reira, i whiwhi ai te putanga tātari iti-haere te he tohu tairitenga e ngātere tae i runga i te whai wāhi ki te wā tāupe.

Kei te whakamana te faafariuraa whakarara, hei tauira, mā parenga hono i roto i te whakarara ki te supply mana pūmau. Ko rite ki te tāuru moka ki te waehere tāuru te maha o pūparenga. Te uara ātete i roto i te mati tino nui ko te 2 nga wa iti iho i te i roto i te mua LSB. I roto i ia ara iahiko resistance he kī. mana waehere Access te kī - te wahi 1, rerenga o nāianei. Nō reira, i roto i te ara iahiko o nāianei ka whakaritea e te taimaha o te rere, me te putanga converter mamati-ki-tairitenga he nāianei kupenga e e hāngai ki te waehere rua tuhia.