TIME-INTERLEAVE A-D CONVERTER AND LASER-TYPE GAS ANALYZER

To provide a time-interleave A-D converter which is simplified in constitution and enhanced in accuracy by back-ground correcting a characteristic error between unit A-D converters, and a laser-type gas analyzer.SOLUTION: A time-interleave A-D converter has: a clock signal generation part 10 for gen...

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Bibliographic Details
Main Authors YAMAUCHI YOSHINORI, NAKANO YOSHIKI, KOIZUMI KAZUHIRO
Format Patent
LanguageEnglish
Japanese
Published 17.06.2022
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Summary:To provide a time-interleave A-D converter which is simplified in constitution and enhanced in accuracy by back-ground correcting a characteristic error between unit A-D converters, and a laser-type gas analyzer.SOLUTION: A time-interleave A-D converter has: a clock signal generation part 10 for generating one of a clock signal for retarding the sampling timings of unit A-D converters ADC1 to ADCM at equal intervals and a clock signal for uniforming the sampling timings; an averaging processing part 20 for calculating an average value of output signals of the unit A-D converters ADC1 to ADCM at averaging processing; correction parts 301 to 30M for correcting output characteristics of the unit A-D converters ADC1 to ADCM with the average value as a reference; and an output part 40 for selecting output signals of the correction parts 301 to 30M at time-interleave processing, and selecting an output signal of the averaging processing part 20 at averaging processing. There is also provided a laser-type gas analyzer having the A-D converter.SELECTED DRAWING: Figure 1 【課題】構成を簡素化し、単位A/D変換器間の特性誤差をバックグラウンド補正して高精度化したタイムインターリーブA/D変換器及びレーザ式ガス分析計を提供する。【解決手段】単位A/D変換器ADC1~ADCMのサンプリングタイミングを等間隔に遅延させるクロック信号とサンプリングタイミングを同一とするクロック信号との何れかを生成するクロック信号生成部10と、平均化処理時に単位A/D変換器ADC1~ADCMの出力信号の平均値を算出する平均化処理部20と、前記平均値を基準として単位A/D変換器ADC1~ADCMの出力特性を補正する補正部301~30Mと、タイムインターリーブ処理時に補正部301~30Mの出力信号を選択し、平均化処理時に平均化処理部20の出力信号を選択する出力部40と、を有するタイムインターリーブA/D変換器、及び、このA/D変換器を備えたレーザ式ガス分析計を提供する。【選択図】図1
Bibliography:Application Number: JP20210095545