摘要:
An extensible three dimensional circuit having parallel array channels includes an access layer and crossbar array layers overlying the access layer and being electrically connected to the access layer. The crossbar array layers include parallel channels, the parallel channels being formed from two classes of vias, the first class being pillar vias connected to relatively short stub lines, and the second class being traveling-line vias connected to long lines that travel away from the via; pillar vias and traveling-line vias being configured to connect to crossing lines such that each crossing point between the lines is uniquely addressed by one pillar via and one traveling-line via. Programmable crosspoint devices are disposed between the crossing lines.
摘要:
An interconnect architecture for connecting read/write circuitry to a memory structure, the interconnect architecture includes a switching layer having a number of access switches arranged in at least one set of two offset switch blocks, the access switches being connected to a first set of parallel wire tracks and a second set of parallel wire tracks intersecting the first set of parallel wire tracks; and a routing layer connecting the switches to a number of access vias of the memory structure; in which four wire tracks are used to select a programmable device of the memory structure.
摘要:
A sense amplifier for reading the data stored in a crossbar array includes a storage transistor to store a first voltage resulting from an electric current from a column line connected to a target memory element while the target memory element is half-selected, the first voltage resulting from bias voltages applied to row lines not connected to the target memory element; a mirror transistor to store a second voltage resulting from an electric current from the column line while the target memory element is fully selected; a cross-coupled inverter circuit having a first branch connected to the storage transistor and a second branch connected to the mirror transistor; and an output node to output a signal from the first branch of the cross-coupled inverter circuit, the signal based on a comparison between the first voltage stored in the storage transistor and the second voltage across the mirror transistor.
摘要:
A method for reading the state of a memory element within a crossbar memory array includes storing a first electric current sensed from a half-selected target memory element within the crossbar memory array; and outputting a final electric current based on the stored first electric current and a second electric current sensed from the target memory element when the target memory element is fully selected.
摘要:
A memory device and method of reading the memory device is disclosed. The memory device includes a first string of MRAM cells and a second string of MRAM cells. The first string of MRAM cells include a plurality of MRAM cells connected in series and the second string of MRAM cells include another plurality of MRAM cells connected in series. A common connection is controllably connectable to one end of the first string of MRAM cells, and to one end of the second string of MRAM cells.
摘要:
The invention includes an apparatus and a method for minimizing power supply sensitivity of a differential amplifier. The apparatus includes a current source providing a differential amplifier bias current to a common source node of the differential amplifier. A voltage sensor senses variations of a power supply associated with the current source. Variations sensed by the voltage sensor control a magnitude of the differential amplifier bias current. The method includes a current source providing the source current. A voltage potential of the common source node is sensed. The current source is adjusted depending upon the sensed voltage potential of the common source node, thereby adjusting a magnitude of the source current.
摘要:
A gain stage in a sense amplifier receives an input signal representing a stored value and senses if the input signal is less than or not less than a reference signal and generates an output signal indicative of a first state when the input signal is less than the reference signal and an output signal indicative of a second state when the input signal is not less than the reference signal. The gain stage further comprises an integrated latch configured to latch the output signal in either the first or second state. Additionally, a controller operates a sense amplifier having multiple operating modes. Sample mode switch logic causes the sense amplifier to sample a first voltage applied to the sense amplifier's input and hold and compare mode switch logic causes the sense amplifier to hold the first voltage for comparison with a second voltage applied to the sense amplifier's input.
摘要:
A method of performing a thermally assisted write operation on a selected two conductor spin valve memory (SVM) cell having a material wherein the coercivity is decreased upon an increase in temperature. In a particular embodiment, a first write magnetic field is established by a first write current flowing from a first voltage potential to a second voltage potential as applied to the first conductor. A second write magnetic field is established by a second write current flowing from a third voltage potential to a fourth voltage potential as applied to the second conductor. The voltage potential of the first conductor is greater than the voltage potential of the second conductor. As a result, a third current, flows from the first conductor through the SVM cell to the second conductor. The SVM cell has an internal resistance such that the flowing current generates heat within the SVM cell. As the SVM cell is self heated, the coercivity of the SVM cell falls below the combined write magnetic fields.
摘要:
A soft-reference three conductor magnetic memory storage device is disclosed. In a particular embodiment, there are a plurality of parallel electrically conductive first sense/write conductors and a plurality of parallel electrically conductive second sense conductors. The first sense/write and second sense conductors may provide a cross point array. Soft-reference magnetic memory cells are provided in electrical contact with and located at each intersection. In addition there are a plurality of parallel electrically conductive third write column conductors substantially proximate to and electrically isolated from the second sense conductors. Sense magnetic fields orient the soft-reference layer but do not alter the data stored within the cell. An associated method of use is also provided.
摘要:
A thin film device and a method of providing thermal assistance therein is disclosed. Accordingly, a heater material is utilized to thermally assist in the operation of the thin film device. By utilizing a heater material to thermally assist in the operation of the thin film device, a substantial improvement in the accuracy and performance of the thin film device is achieved. A first aspect of the present invention is a thin film device. The thin film device includes at least one patterned thin film layer, a heater material coupled to the at least one patterned thin film layer for providing thermal assistance to the at least one of the patterned thin film layers and a conductor coupled to the heater material for supplying energy to the heater material.