A two-terminal memory array includes a plurality of first and second
conductive traces. An address unit operatively applies a select voltage
across a selected pair of the first and second conductive traces and
applies a non-select voltage potential to unselected traces. A total
current flowing in the selected first conductive trace and a leakage
current flowing through unselected second conductive traces are sensed by
a sense unit in a one cycle or a two cycle pre-read operation. The total
and leakage currents can be combined with a reference signal to derive a
data signal indicative of one of a plurality of conductivity profiles
that represent stored data. The conductivity profiles can be stored in a
resistive state memory element that is electrically in series with the
selected first and second conductive traces.