Static type semiconductor memory with latch circuit amplifying read data read on a sub bit line pair and transferring the amplified read data to a main bit line pair and operation method thereof

摘要

A static type semiconductor memory device includes a main bit line pair, and a plurality of memory blocks connected to the main bit line pair. Each of the memory blocks includes a local bit line pair, a static memory connected to the local bit line pair, an amplifier which amplifies potential difference between the paired local bit lines, and a data transfer gate which transfers data between the local bit line pair and the main bit line pair.