ANALOG-DIGITAL CONVERTER AND SEMICONDUCTOR MEMORY DEVICE HAVING THE SAME
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United States of America
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Sep 28, 2021
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Sep 30, 2021
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Sep 3, 2020
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Sep 3, 2020
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Abstract
An analog-digital converter includes a first analog-digital conversion unit configured to, during a first analog-digital conversion operation, sequentially charge each of n first differential node pairs, in response to a respective one of a differential sampling signal pair and first to (n−1)th differential signal pairs among n differential signal pairs, in response to each of the n first differential node pairs being sequentially charged, sequentially generate each of n first differential data pairs, and sequentially generate each of n upper differential data pairs to be used as n-bit upper digital data, in response to a respective one of the sequentially-generated n first differential data pairs. The first analog-digital conversion unit is further configured to, during a second analog-digital conversion operation, simultaneously discharge each of the n first differential node pairs, in response to a nth differential signal pair among the n differential signal pairs.
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