?????? ?????? ?? ????? ??????? ?? ????? ??????? ????? ???????? ??? ?????? ?????? ??? ?????? ??????????.???? ?? ??? ???? ????? ???? ?????? ???? ?????? ???? ?????? ???? ?????? ?? ??????????? ????? ????? ????? ?????? ????? ?? ?????? ????????.As semiconductor technological innovation formulated, lots of the features of analog circuits were being taken