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A five-digit analog-digital converter

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2 Author(s)

The sigma-delta modulation principle is used in a five-digit plus-sign A/D converter. A simple auto-zero circuit is added to eliminate input-offset problems. Two input voltage ranges can be chosen in a cold-switched range-setting mode. The analog subsystem is implemented into two integrated circuits and contains nearly all necessary elements. Only a timer and up/down counter circuit are required to obtain the digital output signal.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:12 ,  Issue: 6 )