Analog-Digital Conversion System and Method for Controlling the Same
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United States of America Patent
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Apr 5, 2016
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Apr 7, 2016
app pub date -
Oct 1, 2014
filing date -
Oct 1, 2014
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Abstract
An analog-digital conversion system includes an analog-digital converter; and a preamplifier circuit which is provided in the previous stage of the analog-digital converter and differentially amplifies an input analog signal. In the preamplifier circuit, an offset voltage and/or a noise occurs and/or is mixed. The preamplifier circuit outputs two types of analog amplified differential signals where a phase is inverted only with respect to the offset voltage and/or the noise. The analog-digital converter has an averaging circuit which averages the two types of analog amplified differential signals for each clock cycle of sampling preceding an analog-digital conversion and outputs a digital signal based on the differential signal averaged by the averaging circuit.
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