static ram

Abstract

A static RAM includes: a plurality of word lines; a plurality of pairs of local bit lines; a plurality of memory cells arranged in correspondence with intersections of the plurality of pairs of local bit lines and the plurality of word lines; a capacitance shared circuit arranged for each of the plurality of pairs of local bit lines; a common connection line connecting the plurality of capacitance shared circuits; and a pair of global bit lines connected to the plurality of pairs of local bit lines, wherein the capacitance shared circuit includes two N-channel transistors connected between the pair of local bit lines and the common connection line corresponding to each other.

Description

technical field [0001] Embodiments discussed herein relate to static RAM (random access memory). Background technique [0002] Static RAM (SRAM) does not need to be refreshed like DRAM (Dynamic Random Access Memory), and thus operates at high speed and is used as a high-speed memory. [0003] On the other hand, in recent years, there has been a need to reduce power consumption of memories. In order to realize a memory with lower power consumption, it is preferable to reduce the operating voltage. In the DRAM, if the operating voltage is reduced, the charging voltage of the capacitor provided in the memory cell is reduced, and therefore, it is preferable to frequently perform refresh operations, and thus, there is a problem that it is difficult to reduce power consumption. As a result, power consumption is reduced by reducing the operating voltage of the SRAM. [0004] A conventional SRAM has: a plurality of word lines and a plurality of pairs of bit lines arranged perpend...

AI Technical Summary

Problems solved by technology

If such a reading speed is set, then when data is read from a memory cell with transistors having average or good characteristics, the transistors of the memory cell thus greatly change one of the pair of bit lines BL and BLX. voltage, as a result, that is, in other words, the magnitude of the amplitude becomes large and power consumption increases

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