Patent ID: 9058852
Filing Date: 2015-06-16
Classification: G11C

Abstract:
1. A method for operating a memory cell, the method comprising: applying a read voltage across a memory element and a bidirectional access device, the memory element programmable to one of a first state and a second state, the memory element having a first capacitance at the first state and a second capacitance at the second state, the first capacitance being lower than the second capacitance; sensing a transient read current due to a voltage drop across the memory element and the bidirectional access device; and determining if the memory element is the first state or the second state based on whether the read current is greater or less than a sense threshold during a read interval, the sense threshold determined based on a ratio between the first capacitance and the second capacitance; and wherein the sense threshold is determined based further on the capacitance ratio of the bidirectional access device and the memory element.