Patent ID: 8189357
Filing Date: 2012-05-29
Classification: G11C

Abstract:
1. A memory comprising: a memory array comprising a memory cell; a sense amplifier comprising a first terminal, coupled to the memory cell, and a second terminal; and a reference circuit comprising: wherein the first and the second reference word line voltages correspond to different voltage levels; wherein when a threshold voltage of the memory cell and the first reference threshold voltage correspond to a similar first voltage level, the threshold voltage of the memory cell and the first reference threshold voltage correspond to substantially a same threshold voltage variation of temperature effect and a cell current of the memory cell and the first reference current correspond to substantially a same current variation of temperature effect; and wherein when the threshold voltage of the memory cell and the second reference threshold voltage correspond to a similar second voltage level, the threshold voltage of the memory cell and the second reference threshold voltage correspond to substantially a same threshold voltage variation of temperature effect and the cell current of the memory cell and the second reference current correspond to substantially a same current variation of temperature effect.