Patent ID: 6865102

Claim:
A static semiconductor storage device comprising: a plurality of word lines extended in a row direction; a plurality of first bit lines extended in a column direction, the plurality of first bit lines including i-th, j-th and k-th first bit lines (i, j and k are different arbitrary positive integers); a plurality of pairs of second bit lines extended in the column direction, the second bit lines including i-th, j-th and k-th pairs of second bit lines respectively corresponding to the first bit lines; a plurality of memory cells respectively arrayed in the row and column directions and connected to the word lines by each row and to the pairs of second bit lines by each column, each of the memory cells having a plurality of transistors cross connected; a plurality of sense amplifiers being used for single-end sensing, each of the sense amplifiers having an input terminal connected to one of each pair of the second bit lines, and having an output terminal connected to each of the first bit lines; a plurality of pairs of write column switches respectively connected between the first bit lines and the pairs of second bit lines, the write column switches including an i-th pair of write column switches connected between the i-th first bit line and one of the i-th pair of the second bit lines corresponding to the i-th first bit line, and between the j-th first bit line and the other of the i-th pair of the second bit lines and the write column switches further including a j-th pair of write column switches connected between the j-th first bit line and one of the j-th pair of the second bit lines corresponding to the j-th first bit line, and between the k-th first bit line and the other of the j-th pair of the second bit lines; and a write controller to control conduction of the plurality of pairs of the write column switches, the write controller including a write controller to control the i-th pair of write column switches and the j-th pair of write column switches to be conductive at different times.