摘要:
A static random access memory (SRAM) write assist circuit with leakage suppression and level control is described. In one embodiment, the SRAM write assist circuit increases the amount of boost provided in a write cycle, while in another embodiment, the SRAM write assist circuit limits the amount of boost provided at higher supply voltages.
摘要:
A content addressable memory (CAM) device includes an array of memory cells arranged in rows and columns; compare circuitry configured to indicate match results of search data presented to each row of the array; and compare circuitry configured to indicate match results of search data presented to each column of the array, thereby resulting in a two-dimensional search capability of the array.
摘要:
An integrated circuit that includes memory containing wordlines and bitcells having SRAM storage elements and being connected to the wordlines. Wordline up-level assist circuitry is provided that is designed and configured to provide a plurality of selectable voltage values that can be selected to provide the wordline up-level voltage that is provided to the bitcells during a memory read cycle and/or write cycle. In one example, the voltage value selected is selected based on characterization of the as-fabricated bitcells so as to decrease the likelihood of the bitcells experiencing a stability failure.
摘要:
A dual word-line level shifter circuit and associated SRAM. A circuit is disclosed that includes a first transistor gated by a data input at the lower voltage, and a second transistor gated by a restore input at the higher voltage, wherein the first and second transistors are coupled along a series path to a source at the higher voltage; a control node along the series path; an output node coupled to the control node via a first pair of parallel transistors; and a feedback circuit having a second pair of parallel transistors and a feedback transistor, wherein the feedback transistor couples the second pair of parallel transistors to the control node and is gated by the output node.
摘要:
A design structure embodied in a machine readable medium used in a design process includes computational memory device having an array of memory cells arranged in rows and columns, and a pair of read word lines associated with each row of the array. The array is configured to implement, for a given cycle, either a read operation of data contained in a single selected row, or one of a plurality of different bit wise logical operations on data contained in multiple selected rows.
摘要:
A method for sensing the contents of a memory cell within a static random access memory (SRAM) includes holding a bit line associated with the memory cell at a zero voltage potential when the memory cell is not being accessed; energizing the bit line to a first voltage potential different than the zero voltage potential during an access of the memory cell; and sensing the memory cell contents when the associated bit line has reached the first voltage potential.
摘要:
A design structure for designing, manufacturing, or testing a content addressable memory (CAM) device. The CAM device includes a plurality of CAM cells, match-lines (MLs), search lines, and ML sense amplifiers. The ML sense amplifiers are capable of self-calibration to their respective thresholds to reduce effects of random device variation between adjacent sense amplifiers.
摘要:
An e-fuse circuit, a method of programming the e-fuse circuit, and a design structure of the e-fuse circuit. The method includes in changing the threshold voltage of one selected field effect transistor of two field effect transistors connected to different storage nodes of the circuit so as to predispose the circuit place the storage nodes in predetermined and opposite states.
摘要:
A low power matchline sensing scheme where power is distributed according to the number of mismatching bits occurring on a matchline is disclosed. In particular, match decisions involving a larger number of mismatched bits consume less power compared to match decisions having a lesser number of mismatched bits. The low power matchline sensing scheme is based upon a precharge-to-miss sensing architecture, and includes a current control circuit coupled to each matchline of the content addressable memory array for monitoring the voltage level of the matchline during a search operation. The current control circuit provides a voltage control signal to the current source of the matchline to adjust the amount of current applied to the matchline in response to the voltage of the matchline. In other words, matchlines that are slow to reach the match threshold voltage due to the presence of one or more mismatching bits will receive less current than matchlines having no mismatching bits. Significant power reduction without compromising search speed is realized since matchlines carrying a match result are provided with the maximum amount of current.
摘要:
This patent describes a method for switching search-lines in a Content Addressable Memory (CAM) asynchronously to improve CAM speed and reduce CAM noise without affecting its power performance. This is accomplished by resetting the match-lines prior to initiating a search and then applying a search word to the search-lines. A reference match-line is provided to generate the timing for the search operation and provide the timing for the asynchronous application of the search data on the SLs. Additional noise reduction is achieved through the staggering of the search data application on the SLs through programmable delay elements.