| 摘要 |
A semiconductor memory apparatus is provided to prevent an operation error like data loss generated by a sensing line and a reference line influencing on a sense amplifier unsymmetrically, by arranging a column selection part connecting the sensing line and the reference line and a local input/output line pair in order for the sensing line and the reference line to have equal length. According to a semiconductor memory apparatus, a sense amplifier shares one bit line with one cell mat and shares the other bit line with the other cell mat. A first sense amplifier(4) performs sensing of a bit line pair. A second sense amplifier(5) performs sensing of the bit line pair. A cell mat comprises a first cell mat region(110) and a second cell mat region(120), and comprises a column selection part(130). The column selection part connects a local input/output line and a bit line connected to the first sense amplifier and a local input/output line and a bit line connected to the second sense amplifier according to the enable of a column selection signal.
|
