A method for sensing a signal received from an array cell within a memory array, the method comprising the steps of generating an analog voltage Vddr proportional to a current of a selected array cell of the memory array, and comparing the analog voltage Vddr with a reference analog voltage Vcomp to...http://www.google.com/patents/US7532529?utm_source=gb-gplus-sharePatent US7532529 - Apparatus and methods for multi-level sensing in a memory array
