Ihe dị iche iche nke sekit ampilifaya igwe na-emeghe (OC gate) nke NPN na PNP: mmepụta mgbanwe nke mmụba saturation.

Onye nchịkọta mepere emepe bụ ngwa pụrụ iche nke sekit amplifier triode. A na-edobe onye na-anakọta C na ọkwa dị elu, na emitter nke E na-edozi na ọkwa dị ala. Mgbe isi nke B na-eziga obere mgbama, a na-emepụta akara mgbama ngbanwe nke ukwuu na onye nchịkọta, nke bụ "1" na sekit dijitalụ. A na-akpọ sekit ihe nrịbawanye mkpokọta mepere emepe mgbe ụfọdụ ka ọnụ ụzọ OC.

N'ime ụlọ ọrụ akpaaka, "PNP" na "NPN" ka egosipụtara ozugbo dị ka ihe mgbama nke PNP open Collector amplifier circuit na mmepụta nke NPN na-emepe ihe nkwụnye ọkụ.

Ọnụ ọnụ nke ọkụ ọkụ na akara nke PNP na-emepe emepe bụ na ọkwa dị ala, nke a na-akpọkwa cathode nkịtị.

Ike ọkọnọ na mgbaàmà nkịtị ọnụ nke NPN open Collector nọ n'ogo dị elu, nke a na-akpọkwa anode nkịtị.

N'ihi ọdịiche nke mgbaama mgbaba direction na nkịtị ọnụ njikọ mode, PNP mgbaàmà na NPN mgbaàmà kwesịkwara dakọtara polarity nke kwekọrọ ekwekọ sekit nnata, ya bụ, PNP ịnata sekit na-enweta PNP mgbaàmà na NPN na-enweta sekit na-enweta NPN mgbaàmà.

Ụdị isi iyi na ụdị drain bụ mbiri nke "isi iyi amplifier circuit" na "drain ampilifaya circuit", nke a na-ahụ anya n'ihe metụtara ugbu a eruba direction nke mgbaama amplifier.

The triode open Collector circuit na-eziga obere mgbaama, nke a na-abawanye na mgbama mgbanwe ka ọ bụrụ mmepụta na onye nchịkọta, nke kwekọrọ na ihe mmetụta nke na-ahụ ihe mgbaàmà anụ ahụ wee pụta ìhè mgbanwe. Ya mere, ọtụtụ ihe mmetụta na-ahọrọ ụdị NPN na PNP na-emeghe ụdị mmepụta mkpokọta. Mmepụta pulse nke incremental encoder bụkwa mgbanwe nke usu dị elu na nke dị ala, yabụ ọtụtụ ndị ntinye ntinye mmalite ahọrọkwala ụdị mmepụta ihe mkpokọ mepere emepe nke NPN na PNP.