METHOD, SYSTEM AND DEVICE FOR NON-VOLATILE MEMORY DEVICE OPERATION
First Claim
Patent Images
1. A device comprising:
- a circuit to generate a reference current;
a circuit to generate a read voltage to be applied to terminals of a correlated electron switch (CES) element in a read operation, the CES element being capable of being placed in a high impedance or insulative state responsive to application of a programming signal to the terminals of the CES element having a critical voltage magnitude and imparting a critical current density magnitude in the CES element;
a circuit to combine a signal current from a bitline coupled to the CES element with the reference current at a node;
a circuit to detect an impedance state of the CES element during the read operation based, at least in part, on a net charge at the node; and
one or more conductive elements configured to limit a current density in the CES element during the read operation to enable a magnitude of the read voltage to equal or exceed the critical voltage magnitude while inhibiting a transition of the CES element from a low impedance or conductive state to the high impedance or insulative state.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are methods, systems and devices for operation of non-volatile memory devices. In one aspect, a correlated electron switch (CES) device may be placed in any one of multiple memory states in a write operation. Limiting current between terminals of the non-volatile memory device during read operations may enable use of higher voltages for higher realized gain.
19 Citations
19 Claims
-
1. A device comprising:
-
a circuit to generate a reference current; a circuit to generate a read voltage to be applied to terminals of a correlated electron switch (CES) element in a read operation, the CES element being capable of being placed in a high impedance or insulative state responsive to application of a programming signal to the terminals of the CES element having a critical voltage magnitude and imparting a critical current density magnitude in the CES element; a circuit to combine a signal current from a bitline coupled to the CES element with the reference current at a node; a circuit to detect an impedance state of the CES element during the read operation based, at least in part, on a net charge at the node; and one or more conductive elements configured to limit a current density in the CES element during the read operation to enable a magnitude of the read voltage to equal or exceed the critical voltage magnitude while inhibiting a transition of the CES element from a low impedance or conductive state to the high impedance or insulative state. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
-
-
2. (canceled)
-
3. (canceled)
-
12. A method comprising:
-
generating a reference current; applying a read voltage to terminals of a correlated electron switch (CES) element, the CES element being capable of being placed in a high impedance or insulative state responsive to application of a programming signal to the terminals of the CES element having a critical voltage magnitude and imparting a critical current density magnitude in the CES element; combining, during application of the read voltage to the terminals of the CES element, a signal current from a bitline coupled to the CES element with the reference current at a node; limiting a current density in the CES element during application of the read voltage to the terminals of the CES element to enable a magnitude of the read voltage to equal or exceed the critical voltage magnitude while inhibiting a transition of the CES element from a low impedance or conductive state to the high impedance or insulative state; and detecting an impedance state of the non-volatile memory element based, at least in part, on a net charge at the node. - View Dependent Claims (13, 14, 15, 17, 18, 19)
-
-
16. (canceled)
Specification