Intaneti ndi analogi Converter: kufotokoza mfundo opaleshoni, ntchito.

chizindikiro analogi yodziwika ndi chiwerengero cha magawo luso, mmodzi amene ali ndi oscillation pafupipafupi. Mwachitsanzo, makutu a anthu amatha kumva zizindikiro ndi pafupipafupi mu osiyanasiyana kuchokera 1 mpaka 22 kHz, ndi kuwala kuonekera limapangidwa pafupipafupi anayeza mabiliyoni hedzi. Chitsanzo cha chizindikiro ndi analogue angathe kutumikira monga kujambula galamafoni umboni. Photos, wakuda ndi oyera poyamba, ndiyeno, ndi mtundu - ndi chitsanzo cha kujambula analogi chizindikiro.

Intaneti ndi analogi Converter ndi pafupifupi zonse zofunika pambuyo pa analogi ndi digito Converter (ADC), umene uli wofunika kwa agawane nanu mau pang'ono, panali vuto bwino amene anathana ndi chipangizo pansi ulemu mwa ife.

ADC otembenuka analogi chizindikiro kwa yadigito. Kawirikawiri chiwerengero cha Chofanana mtengo mbendera pa nthawi ya muyeso, ndi bayinare code. Aliyense muyeso imagwiridwa ndi pafupipafupi wina wotchedwa mlingo zitsanzo zosankhidwazi.

osachepera zitsanzo zosankhidwazi mlingo ndi theoretically m'Malemba amene amapereka undistorted chizindikiro kuchira. chizindikiro ichi alibe kupotoza ndi kubwezeretsa linanena bungwe la digito kwa analogi Converter chizindikiro. quantizing pafupipafupi ayenera kukhala osachepera awiri pazipita pafupipafupi atatembenuzidwa chizindikiro. Mwachitsanzo, chifukwa kusintha kwa undistorted phokoso chizindikiro mokwanira quantization pafupipafupi wofanana 44 kHz.

Tsopano zikuonekeratu kuti Converter digito ndi analogi ndi pa ndondomeko Muzifunsa zizindikiro bayinare, amene ayenera n'kukhala lolingana analogi chizindikiro.

kudalirika Sikuyenda ndi moyo utumiki ali m'gulu manambalawo, koma magawo izi zimadalira mfundo opaleshoni ya DAC, koma zikuluzikulu ndi osunga. Kaya mfundo kusintha DACs amadziŵika ndi makhalidwe monga osiyanasiyana zazikulu, kutembenuka yolinganizika ndi magawo nthawi.

Uthunthu zazikulu anatsimikiza kuti DAC athandizira ndi linanena bungwe, monga chiŵerengero cha mtengo pazipita athandizira (linanena bungwe) kwa osachepera athandizira (linanena bungwe) phindu.

Chimodzi mwa magawo nthawi ndi osiyanitsidwa wa zitsanzo zosankhidwazi pafupipafupi, nthawi otchedwa quantization. Iwo ankadziwa kuti mtengo uwu n'chakuti ya ADC, kudzera amene chizindikiro wakhala anatembenukira kwa DAC.

Kuchuluka zikuluzikulu amakhala liwiro la DAC ndi nthawi kutembenuka. Apa tiyenera kusankha pakati pa kukula kutembenuka - DACs zolondola, koma pasanathe liwiro lake, ndi mosemphanitsa.

Taganizirani mfundo yowatembenuza "digito ndi analogi", popanda mitunduyi ndi ziwembu. Pali awiri kutembenuka mfundo - siriyo ndi kufanana.

The ndondomeko ya zizindikiro digito pa Muzifunsa digito ndi analogi Converter otembenuka ndi ndondomeko ya nyemba amakona anayi pa linanena bungwe. A zimachitika m'lifupi ndi imeneyi wotsatira ku pamaso pa zimachitika pafupi anatsimikiza malingana malamulo ukubwera bayinare. Choncho, linanena bungwe otsika-chiphaso fyuluta analandira ndi chizindikiro analogi ndi nyemba kufika pa athandizira ndi nthawi variable.

Kufanana kutembenuka imagwiridwa Mwachitsanzo, kudzera resistors olumikizidwa ku kufanana kwa chakudya khola mphamvu. chiwerengero cha resistors chofanana ndi pang'ono athandizira kuti malamulo athandizira. Mtengo kukana mu manambala kwambiri nthawi 2 zochepa poyelekeza LSB. M'dera lililonse kukana ali ndi makiyi. Access malamulo akulamulira kiyi - kumene 1, utuluke panopa. Choncho, mu dera panopa kudzayesedwa kulemera kwa kumaliseche, ndi digito ndi analogi Converter linanena bungwe ali ukonde panopa zomwe zizigwirizana ndi malamulo bayinare olembedwa.