Umbane omnye ngumbane ophumayo omnye, oko kuthetha umbane obonelela ngevolthi enye ephumayo okanye umbane oqhubekayo kumthwalo. Olu hlobo lweyunithi yombane lusetyenziswa rhoqo kwizixhobo ezahlukeneyo ze-elektroniki, kubandakanya iziboniso, oomabonakude, kunye nezixhobo zoshishino.
Izixhobo zombane eziphuma ngombane omnye zenzelwe ukuguqula i-input voltage evela kumthombo wamandla, njengesokhethi yodonga okanye ibhetri, ibe yi-output ezinzileyo nethembekileyo ehlangabezana neemfuno zesixhobo esiqhagamshelweyo.