Abstract:
A circuit (115,145,150), for programming a non-volatile memory device (100) having a plurality of memory cells (105), includes a plurality of driving elements (115) each one for applying a program pulse to a selected memory cell to be programmed. The driving elements are suitable to be supplied by a power supply unit (120,125), and a control means (145,150) controls the driving elements (115). The control means (145,150) includes means (150,205) for determining a residual capacity of the power supply unit, and a selecting means (145) selectively enables the driving elements (115) according to the residual capacity. A method of programming, an integrated circuit, and a computer system are also disclosed.
Abstract:
A procedure and device are described for cancellation of the echo produced in telephone connections with electrical time-variant characteristics such as for example those affected by phase roll. The echo canceller obtained in accordance with the procedure which is the object of this invention produces an estimate of the echo signal by means of appropriate digital filtering of the signal originated by the far-end talker. The estimated echo is then subtracted from the actual echo. Filtering is activated by an IIR digital filter whose adaptive coefficients are updated by use of an adaptive algorithm based on decimation of the square error. The high convergence speed of said algorithm in the calculation of the coefficient correction step allows a correct estimate of the echo even in case of connections affected by phase roll.
Abstract:
A solid state mass storage device having a first storage area portion and a second storage area portion. The mass storage device including accessing means adapted to cause data to be stored in the first storage area portion in one of: only in memory cells belonging to columns of a first collection or only to columns of a second collection such that memory cells of the first storage area portion belonging to the first or second collection are left unprogrammed; or only in memory cells of even rows or only memory cells of odd row such that the memory cells of the first storage area belonging to the even or to the odd rows are left unprogrammed; or only in memory cells such that memory cells that are immediately adjacent to said memory cells in said row and column are left unprogrammed.
Abstract:
A memory has one bus for data, addresses, and commands. A data register is coupled to the bus to store the data written to and read from the memory, a command register is coupled to the bus for receiving memory commands, and an address register is coupled to the bus to address the memory. The memory also includes an Error Correction Code circuit for calculating an ECC. The memory is configured to be responsive to external commands for controlling the operation of the ECC circuit for reading or writing of the ECC that are separate from external commands controlling reads or writes of the memory data. The memory may also include a status register that stores information regarding the passing or failing of the ECC.
Abstract:
Embodiments of the invention relate generally to an integrated circuit having a memory cell arrangement and a method for reading a memory cell state using a plurality of partial readings. In an embodiment of the invention, an integrated circuit having a memory cell arrangement is provided. The memory cell arrangement may include at least one memory cell, the memory cell being capable of storing a plurality of memory cell states being distinguishable by a predefined number of memory cell threshold values, and a controller configured to read a memory cell state of the at least one memory cell using a number of reference levels that is higher than the predefined number of memory cell threshold values, wherein the reading includes a first partial reading using a first set of a plurality of reference levels and a second partial reading using a second set of a plurality of reference levels, wherein the second set of a plurality of reference levels includes at least one reference level which is different from the reference levels of the first set of a plurality of reference levels.
Abstract:
A method for operating a flash memory device. The memory device includes a matrix of memory cells each one having a programmable threshold voltage defining a value stored in the memory cell. The method includes the steps of erasing a block of memory cells, and compacting the threshold voltages of the memory cells of the block within a predefined compacting range, wherein the step of compacting includes: selecting at least one first memory cell of the block for writing a target value; restoring the threshold voltage of a subset of the memory cells of the block to the compacting range, the subset including the at least one first memory cell and/or at least one second memory cell of the block being adjacent to the at least one first memory cell; and at least partially writing the target value into the at least one first memory cell.
Abstract:
A method and system for making error corrections on digital information coded as symbol sequences, for example digital information stored in electronic memory systems or transmitted from and to these systems is described, provides the transmission of sequences incorporating a portion of error corrector code allowing the sequence which is more probably the original transmitted through the calculation of an error syndrome using a parity matrix to be restored when received. Advantageously according to embodiments of the invention, the error code incorporated in the original sequence belongs to a non Boolean group.
Abstract:
A method for programming an electrically programmable memory including a plurality of memory cells arranged in individually-selectable memory cell sets each including at least one memory cell. The programming method includes causing the memory cells of a selected memory cells set to be brought into a predetermined, starting programming state. Receiving a target value for the first data bits groups of the memory cells of the selected memory cells set. Receiving a target value for the second data bits groups of the memory cells of the selected memory cells set. After having received the target values of both the first and the second data bits groups, applying to the memory cells of the selected memory cells set a programming sequence adapted to cause the memory cells of the selected memory cells sets to be brought into a target programming state jointly determined by the target values of the first and second data bits groups.
Abstract:
A non-volatile memory device is proposed. The non-volatile memory device includes a plurality of memory cells each one having a programmable threshold voltage, and means for reading a set of selected memory cells with respect to a plurality of reference voltages, for each selected memory cell the means for reading including means for charging a reading node associated with the selected memory cell with a charging voltage, means for biasing the selected memory cell with a biasing voltage, means for connecting the charged reading node with the biased selected memory cell, and means for sensing a voltage at the reading node after a predefined delay from the connection, for at least a first one of the reference voltages the biasing voltage being a first biasing voltage equal to the first reference voltage and the delay being a common first delay, wherein for at least a second one of the reference voltages the biasing voltage is a second biasing voltage different from the second reference voltage, and the delay is a second delay different from the first delay.
Abstract:
A page buffer for an electrically programmable memory including at least one read/program unit having a coupling line operatively associable with at least one of said bit lines and adapted to at least temporarily storing data bits read from or to be written into either one of the first or second memory page stored in the memory cells of a selected memory cell sets. The read/program unit includes enabling means for selectively enabling a change in programming state of a selected memory cell by causing the coupling line to take one among a program enabling potential and a program inhibition potential, conditioned to a target data value to be stored in the first group of data bits of the selected memory cell and an existing data value already stored in the second group of data bits of the selected memory cell. The enabling means includes reading means for retrieving the existing data value, means for receiving an indication of the target data value, combining means for combining the received target data value with the retrieved existing data value, thereby modifying said indication of the target data value so as to obtain a modified indication. Conditioning means in the combining means condition a potential of the coupling line based on the existing data value and the modified indication so as to cause the coupling line to take the program enabling potential or the program inhibition potential.