DEVELOPMENT OF AN INTEGRATED CIRCUIT, TEN-BIT ANALOG-TO-DIGITAL CONVERTER.
FAIRCHILD CAMERA AND INSTRUMENT CORP PALO ALTO CALIF
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The integrated circuit, 10-bit A-D converter was placed in operation under typical test conditions and the performance evaluated using the Fairchild recycling analog-to-digital converter calibrator. Operating at its internal clock rate 525 kc, which yields about 16 musec per bit the converter produced all codes monotonically from 0000000000 to 1111111111 with approximately equal bit intervals. The performance characteristics are listed. The goal of the development effort, to make maximum use of integrated circuits, was possible and desirable in the logic circuits, and an integrated linear amplifier was used in the comparator module. Other circuitry was constructed using cordwood techniques. Advances in integrated-circuit technology since the beginning of this development effort have indicated that it may be feasible to make further use of integrated circuits particularly in the area of ladder switching. The trend and rate of advancement in the field of integrated linear amplifiers indicates that a unit may be available within the next year, which could perform the function of an input buffer amplifier. It is conceivable that performance of this converter could be improved, particularly the speed of operation. Author