Musamman na buɗaɗɗen da'irar amplifier da'ira (Ofar OC) na NPN da PNP: fitarwar sauyawa na haɓakar jikewa.

Buɗe mai tarawa aikace-aikace ne na musamman na da'irar amplifier triode. An saita mai karɓar C a babban matakin, kuma an saita emitter na E a ƙananan matakin. Lokacin da tushe na B ya aika da ƙaramar sigina, cikakkiyar siginar haɓakawa na sauyawa yana fitowa a mai tarawa, wanda shine "1" a cikin da'irar dijital. Bude da'irar amplifier wani lokaci ana kiranta da ƙofar OC.

A cikin masana'antar sarrafa kansa, "PNP" da "NPN" an bayyana su kai tsaye a matsayin fitowar siginar da'ira na buɗaɗɗen ƙararrawa na PNP da kuma fitowar da'irar buɗaɗɗen ƙararrawa ta NPN.

Matsakaicin gama gari na samar da wutar lantarki da siginar mai karɓar buɗewar PNP yana cikin ƙananan matakin, wanda kuma ake kira cathode na kowa.

Wutar lantarki da siginar gama gari na NPN open Collector suna kan babban matakin, wanda kuma ake kira common anode.

Saboda bambance-bambancen siginar kwararar sigina da yanayin haɗin tasha gama gari, siginar PNP da siginar NPN suma yakamata suyi daidai da polarity na da'irar karɓa mai dacewa, wato PNP mai karɓar da'ira tana karɓar siginar PNP kuma NPN mai karɓar kewaye yana karɓar siginar NPN.

Nau'in tushe da nau'in magudanar ruwa sune gajartawar " kewayen amplifier na tushen" da "da'irar amplifier", waɗanda ke da alaƙa na gani da yanayin kwararar sigina na yanzu.

Da'irar mai buɗewa mai buɗewa ta triode tana aika ƙaramin sigina, wanda aka haɓaka zuwa siginar sauyawa don fitarwa a cikin mai tarawa, wanda yayi daidai da firikwensin yana jin siginar jiki sannan ya fitar da siginar sauyawa. Saboda haka, yawancin na'urori masu auna firikwensin suna zaɓar irin wannan nau'in fitarwa na NPN da PNP. Fitowar bugun bugun bugun jini na incremental shima canji ne na bugun jini mai girma da mara nauyi, don haka da yawa masu rikodin haɓakawa na farko suma sun zaɓi wannan nau'in fitowar mai tarawa na NPN da PNP.