??????? ?????? ?? ?? ????? ?? ?? ????? ???? ????? ????? ????? ?????? ?????????? ??????? ?? ??? "??????? ???" ?? ???? ??? ?? "????? ????".?????? ?????????? ?? ????? ????? ??????? ?? ???? ??????? ?? ???? ????? ?? ?????? ???? ??? ???? ?? ?????? ??? ????????.Digital circuit functions is usually divided into two purpose groups: analog and digital. A sel