Abstract:
A non-volatile memory device, having the particularity that it comprises an internal bus (3) for the transmission of data and other information of the memory to output pads (4); timer means (8); and means (5, 5') for enabling/disabling access to the internal bus; the timer means (8) time the internal bus to transmit information signals of the memory device that originate from local auxiliary lines (7) over the internal bus (3) when the bus is in an inactive period during a normal memory data reading cycle; the timer means (8) drive the enabling/disabling means (5, 5') to allow/deny access to the internal bus (3) on the part of the information signals or of the data from or to the memory.
Abstract:
The memory device in accordance with the present invention has hierarchical row decoding architecture and comprises at least one main decoder MD and a plurality of secondary decoders SD. The decoders SD have outputs coupled to a plurality of word lines WL respectively through a plurality of auxiliary lines AL having first ends T1 respectively connected to said outputs and second ends T2 respectively connected to intermediate points IT of the word lines WL.
Abstract:
A reference word line and data propagation reproduction circuit, particularly for non-volatile memories provided with hierarchical decoders, characterized in that the memory is divided into at least two memory half-matrices that are arranged on different half-planes, and in that the circuit comprises, for each one of the at least two memory half-matrices, a reference unit (3 i ) for each one of the at least two memory half-matrices and an associated unit (4) for reproducing the propagation of the signals along the reference unit, the reference unit (3 i ) and the associated propagation reproduction unit (4) having a structure that is identical to each generic word line of the memory device, the reference and propagation reproduction units of one of the at least two memory half-matrices being activatable upon selection of a memory cell in the other one of the at least two memory half-matrices, in order to provide a reference that is synchronous and symmetrical with respect to the selection of the memory cell for reading it and so as to preset, according to the propagation reproduction unit (4), the conditions for starting correct and certain reading of the selected memory cell.
Abstract:
A latch circuit (1) that is intentionally imbalanced, so that a first output (6) reaches ground voltage and a second output (7) reaches a supply voltage; and a fully static low-consumption fuse circuit the particularity whereof resides in that it comprises the intentionally unbalanced latch circuit (1) and a reversing branch that comprises the fuse to be programmed (6) and is adapted to reverse the operation of the latch circuit, so that in the virgin state the fuse (9) connects the second output (7) of the latch circuit (1) to the ground voltage and connects the first output (6) to the supply voltage.
Abstract:
The differential input stage of a sense amplifier is provided with a positive feedback for introducing a predefinable hysteresis that will prevent spurious switchings of the output of the sense amplifier, enhancing noise immunity. The positive feedback is realized by employing an inverting amplifying stage, which will introduce an hysteresis on one of the two switching phases. The thresholds of the sense amplifier may be made symmetric by modifying the area ratio of the load transistors.
Abstract:
A non-volatile memory device (1) having optimized management of data transmission lines, having the particularity that it comprises at least one bidirectional internal bus (3) that runs from one end of the memory device to the other, one or more source structures (5', 5'') that lie externally and internally to the memory device (1), and timer means (8); the timer means (8) are adapted to time-control the independent and exclusive access of the external and internal source structures (5', 5''), within a same memory cycle, to the internal bus (3) for the transmission of data, controls, and functions, from one end of the memory (1) to the other over the internal bus (3).
Abstract:
A power-on-reset (P.O.R.) circuit producing a power-on-reset (P.O.R.) signal whose an amplitude tracks the voltage on said supply node until it exceeds a certain threshold, has first monitoring and comparing means constituted by at least a nonvolatile memory element having a control gate coupled to said supply node, a first current terminal coupled to a ground node and a second current terminal coupled to a first node which is capacitively coupled to the supply node and second means that include an intrinsically unbalanced bistable circuit, having a node that intrinsically is in a high state at power-on coupled to said first node that intrinsically in a low state at power-on coupled to the input of an output buffer.
Abstract:
A data input/output managing device, particularly for non-volatile memories that comprise at least one matrix of memory cells, which has the particularity that it comprises: at least one bidirectional internal bus (1) for the transfer of data from and to the memory; a redundancy management line (2) that is associated with the internal bus (1); means (8) for enabling/disabling the transmission, over the internal bus (1), of the data from the memory toward the outside; means (11) for enabling/disabling access to the internal bus on the part of data whose source is other than the memory matrix, for transmission to the memory matrix; and means (5, 12, 13) for enabling/disabling the connection between the outside of the memory and the redundancy line (2) during the reading of the memory matrix and during its programming.