Abstract:
PROBLEM TO BE SOLVED: To reduce remarkably a time for reading out by connecting respectively one short circuit element to one side bit line of two pairs of bit line, applying a reference signal to a sense amplifier through a first pair of bit line, simultaneously, applying a read-out signal to the sense amplifier through a second pair of bit line. SOLUTION: In a short circuit element SG, being not adjacent bit lines, but every other bit lines are connected mutually. This way is indicated by a bit line BL , BL or bBL , bBL , further, in this case, two control lines INIT , INIT are not used for pre-charge, but used for short-circuiting two bit lines BL , BL or bBL , bBL . Active memory cells L and a reference cell R are arranged comparatively densely in the same block as a memory cell field by arranging utilized pairs of bit line in parallel.
Abstract:
The status is read out from or stored in the ferroelectrical transistor. During the reading out or storing of the status, at least one further ferroelectrical transistor in the memory matrix is controlled such as to be operated in the depletion region thereof.
Abstract:
The invention relates to an MRAM arrangement, comprising a selection transistor (T), connected to several MTJ memory cells (1) and with an increased channel width.
Abstract:
The aim of the invention is to guarantee a high degree of flexibility and a compact construction. To this end, the existing plate conduction device (50) of a memory device (1) which functions on the basis of a hysteresis process is configured to detect the state of a memory capacitor (10) and hence, the information that is stored.
Abstract:
The form of the supply lines in a cell field made from a matrix of columned and lined supply lines of a plurality of magnetic memory cells is optimised by diverging from a quadratic cross-section of the supply lines so that the magnetic field component Bx of the writing currents arranged on the plane of the cell field is rapidly reduced at an increasing distance from the increasing point of intersection.
Abstract:
The present invention relates to a method and apparatus for reducing data errors in a magneto-resistive random access memory (MRAM). According to the disclosed method, data bits and associated error correction code (ECC) check bits are stored into a storage area. Thereafter, the data bits and ECC check bits are read out and any errors are detected and corrected. A data refresh is then initiated based on a count and data bits and associated ECC check bits stored in the storage area are then refreshed by accessing the stored data bits and the associated ECC check bits, and ultimately by checking, correcting and restoring the data bits and the ECC check bits to the storage area.
Abstract:
It is difficult to fabricate a semiconductor memory device without any faulty memory storage cells. One solution is to produce more storage cells than needed on a device and faulty storage cells are replaced by the redundant storage cells. This solution requires that the addresses of the faulty storage cells, along with the replacement storage cells, be saved in a memory. The present invention teaches the use of non-volatile memory cells, particularly magnetoresistive random access memory (MRAM) cells, to store the addresses. Non-volatile memory cells can effectively replace the laser fuses currently used and also provides an advantage in the elimination of the laser fuse-burning step during the fabrication of the device.
Abstract:
The invention relates to an MRAM arrangement, comprising a selection transistor (T), connected to several MTJ memory cells (1) and with an increased channel width.
Abstract:
The invention relates to a memory device comprising numerous memory cells, each cell comprising at least one selection transistor and one stacked capacitor and being driven via word (3) and bit lines (14, 16). Said memory device is characterised in that the bit lines (14, 16) are led through two metallised sheets and in that the stacked capacitors (7, 8, 9) of the memory cells are located between these metallised sheets.
Abstract:
The present invention relates to a method and apparatus for reducing data errors in a magneto-resistive random access memory (MRAM). According to the disclosed method, data bits and associated error correction code (ECC) check bits are stored into a storage area. Thereafter, the data bits and ECC check bits are read out and any errors are detected and corrected. A data refresh is then initiated based on a count and data bits and associated ECC check bits stored in the storage area are then refreshed by accessing the stored data bits and the associated ECC check bits, and ultimately by checking, correcting and restoring the data bits and the ECC check bits to the storage area.