摘要:
A circuit cell for a memory device or a logic device comprises: (i) first and a second logic gates having respective output nodes; and (ii) first and second memory units, each comprising (a) first and second terminals and (b) a resistive memory element and a bipolar selector connected in series between the first and second terminals, wherein the first terminals of the first and second memory units are connected to the output nodes of the first and second logic gates, respectively, wherein the resistive memory elements are configured to be switchable between first and second resistance states, and wherein in response to a switching current and the bipolar selectors are configured to be conducting in response to an absolute value of a voltage difference across the bipolar selectors exceeding a threshold voltage of the bipolar selectors and non-conducting in response to the absolute value being lower than the threshold.
摘要:
A read only memory including a ROM cell array, a plurality of word lines and a plurality of bit lines and a word line driver. The ROM cell array has a plurality of ROM cells. Each of the ROM cells coupled to corresponding bit line and corresponding word line. The word line driver is coupled to the word lines, and respectively provides a plurality of word line signals to the word lines. Each of the ROM cells is a first type ROM cell or a second type ROM cell. The first type ROM cell includes a first top metal structure and a first bottom metal structure. The first bottom metal structure is electrically isolated from the first top metal structure. The second type ROM cell includes a second top metal structure, a second bottom metal structure, and a connection structure. The connection structure is electrically connected the second top metal structure and the second bottom metal structure.
摘要:
There is provided a method for operating a magnetic memory device. The method comprises selecting a subset of magnetic memory cells of the magnetic memory device; applying a first programming voltage to the selected subset of cells for a predetermined amount of time, wherein the programming voltage is selected to exceed a threshold operating voltage thereby to cause irreversible breakdown of the subset of cells; and reading selected cells of the magnetic memory device by passing a read current through a diode connected in series with each magnetic memory cell.
摘要:
A one time programming (OTP) apparatus unit cell includes magnetic tunnel junctions (MTJs) with reversed connections for placing the MTJ in an anti-parallel resistance state during programming. Increased MTJ resistance in its anti-parallel resistance state causes a higher programming voltage which reduces programming time and programming current.
摘要:
In a particular embodiment, a device includes a resistance-based memory cell having multiple source lines and multiple access transistors. A coupling configuration of the multiple access transistors to multiple source lines encodes a data value.
摘要:
Read and write operations of a non-volatile memory (NVM) bitcell have different optimum parameters resulting in a conflict during design of the NVM bitcell. A single bitline in the NVM bitcell prevents optimum read performance. Read performance may be improved by splitting the read path and the write path in a NVM bitcell between two bitlines. A read bitline of the NVM bitcell has a low capacitance for improved read operation speed and decreased power consumption. A write bitline of the NVM bitcell has a low resistance to handle large currents present during write operations. A memory element of the NVM bitcell may be a fuse, anti-fuse, eFUSE, or magnetic tunnel junction. Read performance may be further enhanced with differential sensing read operations.
摘要:
An offset compensated memory element voltage supply including a differential amplifier with a compensation circuit, and a transistor with a gate connected to the output of the differential amplifier. The compensation circuit of the differential amplifier includes a compensation capacitor that stores a compensation voltage during a calibration phase, and applies the stored compensation voltage to a compensation input of the compensation circuit of the amplifier during a measurement phase. Feedback from a source of the transistor controls the output of the differential amplifier to maintain a standard voltage across a resistive memory element connected to the source during measurement of the resistance of the resistive memory element, and the compensation circuit improves the accuracy of the voltage across the resistive memory element by compensating for an offset voltage of the differential amplifier.
摘要:
An electro-optical device includes a plurality of scanning lines that extends in a row direction, a plurality of data lines that extends in a column direction, a plurality of pixels which are provided at intersections of the scanning lines and the data lines and whose gray-scale levels are designated by data signals supplied through the data lines, a common electrode that is provided so as to be opposite to pixel electrodes, a shift register that outputs sampling signals to sequentially select a plurality of blocks each composed of a plurality of the data lines, in a period where the scanning lines are selected, a sampling circuit that samples the data signals to the plurality of data lines belonging to the block selected by the sampling signal, respectively, a data signal supply circuit that changes the potential of the data signal into a higher level and a lower level than a predetermined potential in every predetermined period and then alternately outputs the potentials, and a correction circuit that superimposes, on the data signals, correction signals for correcting potential errors that are generated in the data lines belonging to each of the blocks, corresponding to the potentials of the data lines.
摘要:
An offset compensated memory element voltage supply including a differential amplifier with a compensation circuit, and a transistor with a gate connected to the output of the differential amplifier. The compensation circuit of the differential amplifier includes a compensation capacitor that stores a compensation voltage during a calibration phase, and applies the stored compensation voltage to a compensation input of the compensation circuit of the amplifier during a measurement phase. Feedback from a source of the transistor controls the output of the differential amplifier to maintain a standard voltage across a resistive memory element connected to the source during measurement of the resistance of the resistive memory element, and the compensation circuit improves the accuracy of the voltage across the resistive memory element by compensating for an offset voltage of the differential amplifier.
摘要:
An imporved integrated circuit semiconductor static write and read and erase memory cell for storing in both one and more than one bit of binary data, having a switching transistor (M20) for switching on the memory cell, a data write bit line (26) for writing data into the cell using a column write and read and erase sense circuit (46), a data read bit line (28) for reading data stored in the memory cell, data erase bit line (32) for erasing data stored in the memory cell, a magnetic or electromagnetic element (36) for storing data in form of electromagnetism, a data reading element (34) for reading the data stored as magnetism or electromagnetism, an output current and output voltage bit line (35) for providing an output connection to a column write and read and erase sense circuit (46).