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Semiconductor device

  • US 7,796,453 B2
  • Filed: 06/24/2008
  • Issued: 09/14/2010
  • Est. Priority Date: 06/29/2007
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising:

  • a data amplifier that amplifies a voltage differential of a data I/O line pair and outputs data that has been read to an output buffer;

    a data I/O line switch that controls connection and disconnection between the data I/O line pair and the data amplifier;

    an I/O line precharge circuit that precharges a first portion of the data I/O line pair, wherein the first portion of the data I/O line pair is separated by the data I/O line switch and located not on the side of the data amplifier;

    an amplifier precharge circuit that precharges a second portion of the data I/O line pair, the second portion of the data I/O line pair is separated by the data I/O line switch and located on the side of the data amplifier;

    a column decoder that generates a column selecting signal that selects a bit line pair from among a plurality of bit line pairs to which memory cells are connected according to a column address that is input; and

    a bit line selecting switch that connects, according to the column selecting signal, the bit line pair of a plurality of the bit line pairs and a data I/O line pair that outputs data from a memory cell to the outside.

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