High speed analog-to-digital converter using cells with back-to-back capacitors for both rough and fine approximation

摘要

A high conversion speed analog-to-digital converter is constituted by a plurality of comparison cells which in successive steps determine first the four most significant bits of the analog-to-digital conversion and then the least significant bits of the same, having first accomplished the reconversion of the four most significant bits to analog and their subsequent subtraction from the input signal.