Patent ID: 7852695
Filing Date: 2010-12-14
Classification: G11C

Abstract:
1. A system comprising: at least first and second memory cells; at least first and second sense amplifiers that respectively read data from the first and second memory cells; at least first and second voltage generators that respectively output variable first and second reference voltages to the first and second sense amplifiers; wherein first sense amplifier reads data to from the first memory cell to be ‘high’ or ‘low’ depending one whether a voltage read from the first memory cell is greater than or less that the first reference voltage; wherein the second sense amplifier reads data to from the second memory cell to be ‘high’ or ‘low’ depending one whether a voltage read from the second memory cell is greater than or less that the second reference voltage; a common voltage supply that outputs a common voltage to the first and second voltage generators; wherein the first voltage generator increases the first reference voltage relative to the common voltage if the first memory cell begins to read ‘low’; and wherein the second voltage generator decreases the second reference voltage relative to the common voltage if the second memory cell begins to read ‘high’.