Abstract:
A method and system for approximating resistance in a non-volatile memory has a memory matrix. The memory matrix has a plurality of memory cells and a plurality of memory source lines that are coupled to the plurality of memory cells. A reference matrix is coupled to the memory matrix and has a reference cell. A logic generator is coupled to the reference matrix and is configured to generate an approximation, at the reference cell, of a resistance between a selected one of the plurality of memory cells and at least one of the plurality of memory source lines.
Abstract:
A plurality of memory sub-arrays (302A - 302X) are formed in a p-well region (304). Each of the memory sub-arrays (302A - 302X) has at least one first-level column decoder (306A - 306X) that includes a plurality of low-voltage MOS selector transistors that are also formed within the p-well. A last-level decoder (316) is formed outside of the p-well region (304) and includes high-voltage MOS transistors to provide an output signal to one of an array of sense amplifiers (320). During a memory erase mode of operation, a high voltage is provided to bias the p-well region (304) and a plurality of high-voltage switches (326A - 326X) are activated to provide a high voltage to gate terminals of the selector transistor in the first-level column decoders (306 A 306X).
Abstract:
A method and system for approximating resistance in a non-volatile memory has a memory matrix. The memory matrix has a plurality of memory cells and a plurality of memory source lines that are coupled to the plurality of memory cells. A reference matrix is coupled to the memory matrix and has a reference cell. A logic generator is coupled to the reference matrix and is configured to generate an approximation, at the reference cell, of a resistance between a selected one of the plurality of memory cells and at least one of the plurality of memory source lines.
Abstract:
A redundant memory array (300) has r columns of redundant memory cells (306), r redundant senses (312), and a redundant column decoder (308). Redundant address registers (332) store addresses of defective regular memory cells. Redundant latches (338) are provided in n groups of r latches. Redundancy comparison logic (330) compares addresses of defective regular memory cells with an external input address. If the comparison is true, what is provided is: a DISABLE_LOAD signal (333) to disable the regular senses (310) for one of the n groups of m columns, an ENABLE_LATCH signal (334) to one of the n groups of m columns to disable corresponding regular senses, and one of r REDO signals (336) to a respective one of the r redundant latches (338) in one of the n groups that is disabled. The selected one of the redundant latches (338) activates one of the r redundant senses (312) to access a redundant column.
Abstract:
A system and method for avoiding offset in and reducing the footprint of a non-volatile memory that has a plurality of memory bank circuits. Each memory bank circuit has memory cells coupled to sense amplifiers, row and column decoders coupled to the memory cells, and bias circuits coupled to the sense amplifiers. The system includes a reference cell matrix coupled to each of the plurality of memory bank circuits. The reference cell matrix is configured to provide reference cell current for each of the plurality of memory bank circuits.
Abstract:
A configurable mirror sense amplifier system for flash memory having the following features. A power source generates a reference voltage. A plurality of transistors is biased at the reference voltage. The plurality of transistors is each coupled to a second transistor. Each of the plurality of transistors is also configured to provide a current for comparison with the flash memory. The reference voltage is internal, stable and independent from variations of a power supply or temperature. The plurality of transistors is in parallel with one another. A mirror transistor is coupled to the plurality of transistors. The plurality of transistors is configured so that at least one of at least one transistor is activated with a signal in order to provide the current for comparison to the flash memory. Also, the reference voltage may be modified in order to modify the current for comparison to the flash memory.
Abstract:
A redundant memory array (300) has r columns of redundant memory cells (306), r redundant senses (312), and a redundant column decoder (308). Redundant address registers (332) store addresses of defective regular memory cells. Redundant latches (338) are provided in n groups of r latches. Redundancy comparison logic (330) compares addresses of defective regular memory cells with an external input address. If the comparison is true, what is provided is: a DISABLE_LOAD signal (333) to disable the regular senses (310) for one of the n groups of m columns, an ENABLE_LATCH signal (334) to one of the n groups of m columns to disable corresponding regular senses, and one of r REDO signals (336) to a respective one of the r redundant latches (338) in one of the n groups that is disabled. The selected one of the redundant latches (338) activates one of the r redundant senses (312) to access a redundant column.
Abstract:
A plurality of memory sub-arrays (302A - 302X) are formed in a p-well region (304). Each of the memory sub-arrays (302A - 302X) has at least one first-level column decoder (306A - 306X) that includes a plurality of low-voltage MOS selector transistors that are also formed within the p-well. A last-level decoder (316) is formed outside of the p-well region (304) and includes high-voltage MOS transistors to provide an output signal to one of an array of sense amplifiers (320). During a memory erase mode of operation, a high voltage is provided to bias the p-well region (304) and a plurality of high-voltage switches (326A - 326X) are activated to provide a high voltage to gate terminals of the selector transistor in the first-level column decoders (306A - 306X). One or more intermediate-level column decoders (312) are formed as low-voltage selector transistors in the p-well (304) between the first-level column decoder (306A - 306X) and the last-level column decoder (316). Each of the intermediate- level column decoders (312) also has a high-voltage switch (326Y) that is activated during a memory erase mode of operation to provide a high voltage to gate terminals of the intermediate- level column decoders (312).
Abstract:
An apparatus and method for improving the performance of an electronic device is disclosed. An idle voltage state is introduced by an adaptive voltage generator when providing or removing a high voltage signal from a line or a node in a circuit. The idle state reduces the undesirable effects of switching disturbances caused by sudden voltage changes in a line or node.
Abstract:
Regulating a program voltage value during multilevel memory device programming includes utilizing a program path duplicate in an output pump regulator circuit. Further, the output pump regulator circuit is utilized to provide a regulated program voltage for memory cell programming, the regulated program voltage correcting for a program path voltage drop and compensating for temperature variation.