System and method for storing and retrieving multi-bit data from non-volatile memory using current multipliers

摘要

The memory device includes memory cells each configured to generate an output current during a read operation. Circuitry is configured to generate, for each of the memory cells, a read value based on an output current of the memory cell. The circuitry is configured to, for each of the memory cells, multiply the read value for the memory cell by a multiplier to produce a multiplied read value, wherein the multiplier for each memory cell is different from the multipliers for any other of the memory cells. different A circuit is configured to sum the multiplied read values. The readings may be currents, voltages or numerical values. Alternatively, added constant values may be used instead of multipliers. Multipliers or constants may be applied to read currents from individual cells or to read currents on entire bit lines.