| 摘要 |
A D/A CONVERTER OF A MULTIBIT TYPE HAS IMPROVED PERFORMANCE BY REDUCING DISPERSION OF THE ELECTRIC CURRENTS OF PLURAL ELECTRIC CURRENT SOURCES AS MUCH AS POSSIBLE. IN WHICH THE D/A CONVERTER HAS A CONSTANT ELECTRIC CURRENT SOURCE (10) CONSTRUCTED BY 2N (N=2, 3, --- AND HERE, N=16) CONSTANT ELECTRIC CURRENT SOURCES HAVING CONSTANT ELECTRIC CURRENT VALUES EQUAL TO EACH OTHER; SELECTING MEANS (7, 8) FOR SELECTING DI CONSTANT ELECTRIC CURRENT SOURCES ACCORDING TO INPUT DATA DI {HERE, DI=0, 1, 2, 3, ---, (2N-1)} HAVING N-BITS IN INPUT WORD LENGTH SO AS TO USE THESE 2N CONSTANT ELECTRIC CURRENT SOURCES ONE BY ONE UNTIL A SUM OF VALUES OF ONE INPUT DATA OR CONTINOUS PLURAL INPUT DATA AMONG THESE 2N CONSTANT ELECTRIC CURRENT SOURCES EXCEEDS 2N; AND AN ELECTRIC CURRENT ADDING MEANS (9) FOR ADDING EACH OF THE CONSTANT ELECTRIC CURRENTS FROM THE DI CONSTANT ELECTRIC CURRENT SOURCES SELECTED BY THE SELECTING MEANS TO EACH OTHER.THE MOST ILLUSTRATIVE DRAWING IS (FIGURE NO.2)
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