摘要:
A memory device includes a plurality of pairs of complimentary bit lines and a plurality of latch circuits. Each pair of the plurality of pairs of complimentary bit lines is coupled to a column of memory cells. Each latch circuit has an input coupled to a data line and a first output and a second output to provide complementary latched values dependent upon a value of the data line. For each latch of the plurality of latches, the first output is coupled to a first bit line of a pair of the plurality such that a value of the first bit line is continuously determined by the first output during memory device operation and the second output is coupled to a second bit line of the pair such that a value of the second bit line is continuously determined by the second output during memory device operation.
摘要:
A memory system includes a memory controller and a memory component coupled to each other. The memory controller includes an interface to receive a first signal and a second signal from the memory component, wherein the first signal comprises a first symbol and the second signal comprises a second symbol. A first circuit of the memory controller receives the first signal by sampling the first symbol using a first timing offset relative to a reference clock signal, and a second circuit of the memory controller receives the second signal by sampling the second symbol using a second timing offset relative to the reference clock signal. The first timing offset is independent of the second timing offset.
摘要:
A clock recovery circuit has a boundary detection circuit (20, 21, 22, 23) detecting a boundary in an input signal in accordance with a first signal, and performs recovery of a clock by controlling the timing of the first signal in accordance with the detected boundary. The clock recovery circuit has a boundary detection timing varying circuit (42) and a variation reducing circuit (9). The boundary detection timing varying circuit (42) dynamically varies boundary detection timing in the boundary detection circuit (20, 21, 22, 23) by applying a variation to the first signal, and the variation reducing circuit (9) reduces a phase variation occurring in the recovered clock in accordance with the dynamic variation of the boundary detection timing performed by the boundary detection timing varying circuit (42).
摘要:
The primary drive block generates most significant bit (MSB) symbol component. The LSB symbol component is combined with MSB symbol component, to provide the output symbol. Independent claims are also included for the following: (1) Bus receiver; (2) Memory; (3) Error correction method in multi pulse amplitude modulated system; (4) Bus system; (5) Memory system; (6) Operating method of multi drop bus; (7) Apparatus for transmitting data on multi drop bus.
摘要:
A semiconductor memory has a memory cell array (11), a command decoder (14), and an input/output control circuit (20). The memory cell array (11) has a plurality of memory cells which store data. The command decoder (14) decodes a command input from outside. The input/output control circuit (20) controls writing of data into the memory cell and an output of the data to the outside, in accordance with an output of the command decoder (14). If a write command is input in the command decoder (14), write data received from outside is written in the memory cell when two write commands are input in the command decoder (14) subsequent to the write command.
摘要:
The present invention relates to the reducing timing uncertainties in high-performance digital circuitry and more specifically, to a timing control means and a method for minimizing timing uncertainties due to skew and jitter. A means for the compensation of timing errors in multiple channel electronic devices comprising at least one register having a plurality of channels comprises: a clock for providing a clock signal; a reference signal generator for generating reference signals for deskewing the registers; wherein for each said register a corresponding feedback loop is associated for the relative alignment of register's timing, the feedback loop comprising a means for detecting a deviation from a predetermined level of probability of reading by said register a desired symbol on a boundary of two reference channel symbols in a sequence and a set of delay means which uses the detected values of probability to generate a feedback signal. The invention is preferably implemented in a self calibrated receiver and a self calibrating transmitter. Also, the invention can be employed in a digital interface between two items or within a circuit where there is a requirement for tight timing control such as requirement for a low skew between the channels of a register.
摘要:
L'invention concerne un procédé de gestion à accès rapide et aléatoire d'une mémoire de type DRAM, comprenant les étapes suivantes :
diviser la mémoire en blocs mémoire (21) accessibles indépendamment en lecture et en écriture ; identifier l'adresse (@b) du bloc concerné par une requête courante ; comparer l'adresse du bloc concerné par une requête courante aux adresses des N-1 blocs antérieurement requis, N étant un nombre entier de cycles nécessaire à l'exécution d'une requête ; et si l'adresse du bloc concerné par une requête courante est égale à l'adresse d'un bloc correspondant à l'une des N-1 requêtes antérieures, suspendre et mémoriser la requête courante jusqu'à exécution de la requête antérieure visant le même bloc, sinon l'exécuter.
摘要:
A dynamic latch receiver device comprises a sequence of data latch devices arranged in parallel for enabling sequential latching of data signals communicated serially on a single data line. The device includes a first pointer signal generator for generating a sequence of one or more first pointer signals, each generated first pointer signal of a sequence corresponding to a specific latch device and overlapping in time with a prior generated first pointer signal of the sequence; and, a pulse converter device associated with a latch device for receiving a corresponding first pointer signal and generating a respective second pointer signal for input to a respective latch device, each second pointer signal generated in a non-overlapping sequence for triggering a respective latching of each data signal in synchronism with serially communicated data signals.
摘要:
An input buffer circuit includes a first amplifier (11, 20) causing a first change in an output signal by detecting a rising edge of an input signal, a second amplifier (12, 30) causing a second change in the output signal by detecting a falling edge of the input signal, and a feedback path feeding back the output signal as a feedback signal to the first amplifier (11, 20) and the second amplifier (12, 30). The feedback signal controls the second amplifier (12, 30) such that a timing of the first change only depends on the first amplifier (11, 20), and controls the first amplifier (11, 20) such that a timing of the second change only depends on the second amplifier (12, 30).