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US 8,947,913 B1Granted
Circuits and methods having programmable impedance elements
AssigneeAdesto Technologies Corporation
InventorsNarbeh Derhacobian, Ishai Naveh
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Abstract
Integrated circuit (IC) devices are disclosed that include programmable impedance elements (elements) as data storage element. In some embodiments, IC devices can include latch circuit with one or more elements that establish a function of an associated circuit. In other embodiments, IC devices can include elements arranged in a cross-point array connected to control terminals of access devices. In still other embodiments, a memory device can include a programmable address decoder. Corresponding methods are also disclosed.
Claims36
An integrated circuit (IC) device, comprising:
- a plurality of memory cells that store configuration data, each memory cell including a latch circuit and at least one programmable resistance element, each memory cell being coupled between a first supply voltage and a virtual supply node;
- a re-configurable circuit coupled to the memory cells having a function that varies in response to the configuration data;
- and
- a mode switch circuit having switchable paths that couple the virtual supply node between at least a second supply voltage and a write voltage, the mode switch configurable to couple the virtual supply node to the write voltage to change the programmable resistance element to a first resistance value, and to couple the virtual supply node to the second supply voltage to change the programmable resistance element to a second resistance value;
- wherein the second supply voltage is different than the write voltage.
2 more elements
A method, comprising:
- storing configuration data for a configurable circuit in memory circuits that each include a latch circuit and at least one programmable resistance element coupled between a first supply voltage and a virtual supply node that is written to at least one of a plurality of resistance values, including for each memory circuit,
- driving a bit line to a bit line voltage corresponding to a data value to be stored, and
- driving the at least one virtual supply node to a write supply voltage to write the programmable resistance element to a first resistance value, and driving the one virtual supply node to a second voltage to write the programmable resistance element to a second resistance value;
- wherein the second voltage is different from the write supply voltage.
1 more element
An integrated circuit (IC) device, comprising:
- a plurality of memory cells that store configuration data, each memory cell including a latch circuit and first and second programmable resistance elements, each memory cell being coupled between a first supply voltage and a virtual supply node;
- a re-configurable circuit coupled to the memory cells having a function that varies in response to the configuration data;
- and
- a mode switch circuit having switchable paths that couple the virtual supply node between at least a second supply voltage and a write voltage;
- wherein
- the first and second programmable resistance elements comprise programmable metallization cells (PMCs) having cathodes coupled to the latch circuit and anodes coupled to the virtual supply node;
- wherein the second voltage is different from the write supply voltage.
4 more elements
An integrated circuit (IC) device, comprising:
- a plurality of memory cells that store configuration data, each memory cell including a latch circuit and first and second programmable resistance elements, each memory cell being coupled between a first supply voltage and a virtual supply node;
- a re-configurable circuit coupled to the memory cells having a function that varies in response to the configuration data;
- and
- a mode switch circuit having switchable paths that couple the virtual supply node between at least a second supply voltage and a write voltage;
- wherein
- the first and second programmable resistance elements comprise programmable metallization cells (PMCs) having anodes coupled to the latch circuit and cathodes coupled to the virtual supply node;
- wherein the second voltage is different from the write supply voltage.
4 more elements
An integrated circuit (IC) device, comprising:
- a plurality of memory cells that store configuration data, each memory cell including a latch circuit and first and second programmable resistance elements, each memory cell being coupled between a first supply voltage and a virtual supply node;
- a re-configurable circuit coupled to the memory cells having a function that varies in response to the configuration data;
- and
- a mode switch circuit having switchable paths that couple the virtual supply node between at least a second supply voltage and a write voltage;
- wherein
- the first and second programmable resistance elements comprise programmable metallization cells (PMCs) with one PMC having an anode coupled to the latch circuit and a cathode coupled to the virtual supply node, and the other PMC having a cathode coupled to the latch circuit and an anode coupled to the virtual supply node;
- wherein the second voltage is different from the write supply voltage.
4 more elements
Dependencies are inferred from the claim text.