Patent ID: 6989778

Claim:
A semi-conductor circuit comprising: a digital to analog conversion circuit; an adding circuit operable to add an output current signal of the digital to analog conversion circuit as an input current signal to at least one further input current signal, the adding circuit further operable to provide a plurality of adding circuit output signals; and a quantizing circuit including a plurality of comparator elements, each of the plurality of comparator elements operable to receive at least one input signal and provide a comparator element output signal; wherein the at least one input signal of each of the plurality of comparator elements is derived from one of the plurality of adding circuit output signals and wherein the comparator element output signals are provided as digital input signals to the digital to analog conversion circuit; and wherein the adding circuit comprises a resistor ladder including a first string and a second string, the first string and the second string each comprising a series circuit of a plurality of tapping resistors, wherein each of the plurality of adding circuit output signals is formed by a voltage between a tap at one of the plurality of tapping resistors of the first string and a tap one of the plurality of tapping resistors of the second string.