Patent ID: 6980456

Claim:
A virtual ground memory comprising: a plurality of memory cells; a plurality of first metal lines at least including first metal lines GL(n−1), GL(n), and GL(n+1) and a plurality of second metal lines at least including second metal lines BL(n−1) and BL(n), the first metal lines GL(n−1), GL(n), and GL(n+1) and the second metal lines BL(n−1) and BL(n) are disposed in the sequence GL(n−1), BL(n−1), GL(n), BL(n) and GL(n+1), each first metal line and the adjacent second metal line are coupled respectively to two ends of the corresponding memory cells, and the second metal lines BL are in high level when the memory cells which the second metal lines BL are coupled to are chosen; and a plurality of word lines, for controlling the memory cells; wherein a first sense amplifier is coupled to the second metal line BL(n−1), a second sense amplifier is coupled to the second metal line BL(n), and the first metal lines GL(n−1) and GL(n+1) are coupled to ground level, and one of the word lines is enabled to read the corresponding memory cells.