Patent ID: 7471221
Filing Date: 2008-12-30
Classification: H03M

Abstract:
1. An analog-to-digital apparatus to which an analog signal is divergingly supplied and which corrects digital data output from a plurality of analog-to-digital conversion units that sequentially converts the analog signal in different timing by a predetermined phase, the analog-to-digital conversion apparatus comprising: an interleaving unit operable to align the digital data respectively output from the plurality of analog-to-digital conversion units according to the timing in which the digital data are respectively converted and to generate a data sequence; and a correction arithmetic unit operable to correct a data value error of the data sequence caused by an error of a frequency characteristic for each of the plurality of analog-to-digital conversion units, based on said frequency characteristics of each of the analog-to-digital conversion units, wherein said correction arithmetic unit comprises: a data partitioning unit that partitions the data sequence into a plurality of partition data having a predetermined partition data number and respectively generates the partition data so that duplicated data of a predetermined number at the head of each of the partition data is overlapped with duplicated data of the predetermined number at the end of the partition data in front of that partition data; an arithmetic unit that sequentially acquires the partition data respectively generated from the data partitioning unit and sequentially outputs data after correction made by sequentially performing correction arithmetic according to the frequency characteristic of each analog-to-digital conversion unit with respect to the acquired partition data; and a data connecting unit that removes either of the duplicated data at the end of each data after correction sequentially output from the arithmetic unit according to each partition data or the duplicated data at the head of that data after correction and sequentially connects the end of that data after correction and the head of the data after correction following that data after correction.