Patent ID: 6665216
Filing Date: 2003-12-16
Classification: G11C

Abstract:
A system for reading data in a memory cell, comprising:a first comparator having a first input and a second input; a second comparator having a first input and a second input; a first reference cell having a low reference voltage coupled to the first input of the first comparator; a second reference cell having a high reference voltage coupled to the first input of the second comparator; a memory cell having a memory cell voltage coupled to the second input of the first comparator and the second input of the second comparator; and a third comparator having a first input and a second input, the first input of the third comparator being coupled to an output signal of the first comparator, and the second input of the third comparator being coupled to an output signal of the second comparator, wherein the output signal of the first comparator includes a difference voltage between the memory cell voltage and the low reference voltage and wherein the output signal of the second comparator includes a difference voltage between the memory cell voltage and the high reference voltage.