摘要:
An MRAM module configuration in which, in order to increase the packing density, memory cell zones containing memory arrays and peripheral circuits are nested in one another. In this manner, an increased packing density of the memory cell is achieved which results in lowered production costs and a smaller chip space for a more compact configuration.
摘要:
A current driver configuration for MRAMs includes word-line drivers and bit-line drivers at respective first ends of word lines and bit lines. The word line drivers and the bit line drivers each include a series circuit formed by an n-channel field-effect transistor and a current source. Further series circuits are provided at the respective second ends of the word lines and the bit lines. Each of the further series circuits includes a second n-channel field-effect transistor and a voltage source.
摘要:
A CMOS voltage divider having a first chain containing series-connected MOS transistors of a first conductivity type is described. Each of the MOS transistors have identical geometrical dimensions and, at the same time, each have identical gate-source voltages. The MOS transistors operate in the linear range of their characteristic curve and between opposite ends of the first chain an input voltage to be divided is present and at whose source terminals the voltage fractions can in each case be picked off. Provision is made of a second chain containing series-connected MOS transistors, complementary to the first MOS transistors. The second chain has the same number of transistors as the first MOS transistors and with the same geometrical dimension in each case. The MOS transistors of the first chain are connected to the MOS transistors of the second chain in such a way that each MOS transistor chain generates the gate-source bias voltage for the respective other MOS transistor chain.
摘要:
An integrated memory has a multiplexer and a differential sense amplifier with a differential input. The differential sense amplifier is connected to three bit lines by the multiplexer. The multiplexer electrically connects the differential input of the sense amplifier to any two of the three bit lines connected to it respectively, in accordance with its activation.
摘要:
A semiconductor memory device has a particularly space-saving configuration of the memory areas and, in particular, of the selection devices assigned to the memory areas. During operation, each selection device can be assigned in a controllable manner to a plurality of memory areas such that selectively each of the selection devices can carry out an addressing and selection in one of the assigned memory areas.
摘要:
An integrated semiconductor memory has memory cells that are combined to form addressable normal units and to form at least one redundant unit for replacing one of the normal units. In addition, the semiconductor memory has an address bus to which an address can be applied, and a redundancy circuit that is connected to the address bus. The redundancy circuit is used to select the redundant unit. An input of a processing unit is connected to a connection of the address bus and also to a connection for a test signal, and the output of the processing unit is connected to an input of the redundancy circuit. The redundant unit can be tested before the repair information is programmed in the redundancy circuit. The circuit complexity required for this is comparatively low.
摘要:
A magneto-resistive random access memory (MRAM) configuration is described in which line driver circuits are respectively assigned via connecting nodes to two memory cell arrays, with the result that the area for the driver circuits can practically be halved. Therefore a space-saving architecture and a more efficient MRAM configuration is obtained.
摘要:
The memory has identically constructed memory cells and reference cells. An item of reference information is written into the reference cells by uncoupling the reference cells from the read amplifiers via first switching elements, and by electrically connecting the part of the bit lines that is connected to the reference cells via second switching elements to a potential line carrying the reference information.
摘要:
In a semiconductor memory configuration, a refresh operation is always started by a refresh logic circuit when a comparison circuit determines that there is a specific minimum difference when comparing a characteristic variable of at least one reference memory cell with a reference value (VREF).