摘要:
In a system for conducting virtual address translation in a virtual memory system and implementing a table such as a Translation Lookaside Buffer, a system and method enabling quicker access to tables entries in which the entries are addressed after adding a plurality of address parts wherein the plurality is two (2) or (3). Particularly, a smaller and/or faster adder is used having, for example, only n=2 ports in the time critical path. In order to make the exact address calculation, during array accesses, a multiplexor is implemented to decide, after the TLB arrays are accessed for preselection, which of a plurality of possible entries has to be taken.
摘要:
In a circuit that reduces power consumption in an array system of memory cells accessible in parallel, a local evaluation circuit is connected to a memory cell and a global bit line of the array system of memory cells. A selection circuitry splits the global bit line into an upper part and a lower part of the global bit line. The selection circuitry is adapted to receive an early set prediction signal and to connect the upper part of the global bit line to the lower part of the global bit line based on the early set prediction signal. The early set prediction signal indicates whether a set of memory cells, which include the memory cell, is being read. The circuit also includes a N:1 multiplexer connected to the lower part of the global bit line to receive the lower part of the global bit line as input.
摘要:
A circuit (01) combining level shift function with gated reset is described, performing a simple logic function with inputs supplied from a lower voltage (VD) and a drive out at its output (05) with a higher voltage (VC). Said circuit (01) comprises a gated reset scheme plus devices (10, 30, 40) for logic function.
摘要:
A domino read bit line structure (20) integral to an SRAM array (1, 2) with thirty-two word lines or less to access SRAM cells divided into two groups (3, 4, 90, 100) is described. The bit line structure (20) includes a dynamic bit decode multiplexer (11, 40) and two NAND circuits (5, 80) used to combine the two groups (3, 4, 90, 100), wherein in order to reduce power consumption the two NANDS (80) drive the dynamic bit decode multiplexer (40) directly, such that true and complement dynamic outputs (rt, rc) drive a set-reset latch (50) to convert the dynamic outputs (rt, rc) to a single static signal (doc), wherein the output of the set-reset latch (50) is already static so that the set-reset latch (50) acts as an effective array output latch (7).
摘要:
The present invention relates to dynamic hardware logic of computer processors. In particular, it relates to a method and respective system for operating a dynamic logic circuit implementing some predetermined logic function with reduced charge sharing. In order to further reduce charge sharing it is proposed to provide a predetermined number of pre-engineered switching arrangements (24, 26, 28) implementing the same logic function with a different combinatorial distribution of input variables (A, B, C), wherein each arrangement is connected between said precharged node of higher potential and a lower potential.
摘要:
The present invention relates to dynamic hardware logic of computer processors. In particular, it relates to a method and respective system for operating a dynamic logic circuit implementing some predetermined logic function with reduced charge sharing. In order to further reduce charge sharing it is proposed to provide a predetermined number of pre-engineered switching arrangements (24, 26, 28) implementing the same logic function with a different combinatorial distribution of input variables (A, B, C), wherein each arrangement is connected between said precharged node of higher potential and a lower potential.
摘要:
A digital adder circuit comprising a plurality of logical stages in the carry logic of said adder circuit, for generating and propagating predetermined groups of operand bits, each stage implementing a predetermined logic function and processing input variables from a preceding stage and outputting result values to a succeeding stage static and dynamic logic in the carry network of a 4-bit adder, and with output from the first stage fed directly as an input (60, 62) to the third stage of the carry network. Preferably, stages having normally relatively high switching activities are implemented in static logic. Preferably, the first stage of its carry network is implemented in a static logic, and the rest of the stages in dynamic logic.
摘要:
The present invention relates to the field of hardware logic circuits and in particular to dynamic hardware logic implemented in computer processors, and more particularly, to an integrated circuit comprising a dynamic logic function implementing a predetermined logic function with a plurality of transistor stacks, the integrated circuit comprising a precharge node at the input of said logic function implementation, an output latch connected to the output node of said logic function for stabilizing the result of the evaluation of said logic function. The present invention provides such integrated dynamic circuit with a latch, which is protected against instability even in situations involving complex logic functions which are evaluated and their output states are saved by said output latch.
摘要:
The present invention relates to content addressable memory (CAM), particularly, to a CAM having its memory array, which contains a plurality of memory locations, being divided into at least a first and a second memory block (100, 102), whereby the first and second memory block (100, 102) are formed by a first and second portion of each of said memory locations, respectively. The CAM further comprises a first set of compare lines (115) and a first set-of match lines (116) associated to said first memory block (100), and a second set of compare lines (117) and a second set of match lines (118) associated to said second memory block (102), and pre-charge units (112, 114) for charging said match lines before a comparison operation. The present invention provides an improved CAM which allows flagging of memory locations of which the content only partially matches a given comparison value. This is achieved by a CAM according to the above features using the pre-charge state of the match lines (116, 118) as a logically valid state.
摘要:
A memory array can be arranged with header devices to reduce leakage. The header devices are coupled with a decoder to receive at least a first portion of a memory address indication and are coupled to receive current from a power supply. Each of header devices is adapted to provide power from the power supply to a set of the wordline drivers corresponding to a bank indicated with the first portion of the memory address indication. Each of the logic devices is coupled to receive at least a second portion of the memory address indication from a decoder. Each of the logic devices is coupled to activate the wordline drivers coupled with those of the wordlines indicated with the second portion of the memory address indication.