Design of a transistorized 1.5-megabit analog-to-digital encoder

BIXARY ENCODING is a process of measuring an analog quantity in a binary number system. The accuracy of measurement for the chosen circuit configuration is of major importance. Among the different possible schemes for measurement, a bit-ut-a-time system permits, for transistorized circuits, both accuracy and speed. The signal 3c is compared with a successive sum of references in such a way that the jth comparison determines the value of a,; (0 or 1 ) in the sum: