Patent ID: 6856265

Claim:
A data converter for converting an input signal to a plurality of digital bits, the data converter comprising: n first comparison units for respectively comparing the input signal with n reference signals, each of the comparison units including a positive output end for outputting a first positive output and a negative output end for outputting a first negative output; n second comparison units for respectively comparing the input signal with the n reference signals, each for outputting a second comparison units including a positive output end for outputting a second positive output and a negative output end for outputting a second negative output; and an output unit electrically connected to the n first comparison units and the n second comparison units for generating digital bits corresponding to the n first comparison units and the n second comparison units, the output unit comprising: n-1 interpolating units electrically connected to the n first comparison units and the n second comparison units, a k th interpolating unit being electrically connected to a k th and a k th +1 first comparison units and a k th and a k th +1 second comparison units for adding a third positive output to the first and second positive outputs of the n first comparison units and the n second comparison units and adding a third negative output to the first and second negative outputs of the n first comparison units and the n second comparison units; wherein when the k th and the k th +1 first comparison units perform an auto-zeroing process, the k th interpolating unit is capable of utilizing the second positive outputs of the k th and the k th +1 second comparison units for generating the third positive output and utilizing the second negative outputs of the k th and the k th +1 second comparison units for generating the third negative output; wherein the output unit generates a digital bit interpolated between a digital bit corresponding to the k th second comparison unit and a digital bit corresponding to the k th +1 second comparison unit according to the third positive output and the third negative output in a differential manner.