| 摘要 |
PROBLEM TO BE SOLVED: To provide a column decoder that decodes column addresses and outputs column selection signals, and a semiconductor memory apparatus using the same. SOLUTION: The column decoder includes a plurality of main decoding units coupled to different memory banks that decode pre-decoding signals and output column selection signals to the corresponding memory banks, and one or more pre-decoders having a lesser number than all the main decoders of the plurality of main decoding units and outputting the pre-decoding signals obtained by decoding the column addresses and the bank information signals such that the plurality of main decoding units selectively use the output pre-decoding signals. COPYRIGHT: (C)2009,JPO&INPIT
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