Patent ID: 8498164
Filing Date: 2013-07-30
Classification: G11C

Abstract:
1. An integrated circuit, comprising: at least one programmable metallization cell (PMC) comprising an ion conducting material and a metal dissolvable in the ion conducting material, selectively connected to a shunt node; and a biasing circuit comprising a current source coupled to the shunt node configurable to provide a first current in a first type operation, and a voltage regulator coupled to the shunt node configured to regulate a potential at the shunt node; wherein in the first type operation, the voltage regulator shunts current with respect to the shunt node in a same direction as a current flow of the at least one PMC, and the voltage regulator includes a regulator amplifier having a first input coupled to a reference voltage and a second input coupled to the shunt node, and an amplifier output, and a one-way current supply device coupled to the shunt node configured to provide current in one direction based on a signal from the amplifier output.