Abstract:
PROBLEM TO BE SOLVED: To reduce an entire power consumption as much as possible. SOLUTION: A memory system and method is disclosed. In one embodiment, a memory system has a memory controller and at least one memory module, and the fixed number of semiconductor memory chips and connection lines are disposed in specific connection forms respectively on the memory module. The connection lines have first connection lines. The first connection lines form transmission channels for transmitting data and instruction signal streams on the basis of protocols, from the memory controller to at least one memory chip on the memory module and from memory chips to the memory controller. Second connection lines are independently wired from the memory controller to at least one memory chip on the memory module, for the purpose of directly transmitting selection information to at least one memory chip separately from data and instruction signal streams. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
The aim of the invention is to restore data transmitted via a transmission line, especially a cable. To this end, the corresponding signal received by the receiver is amplified, and the amplified signal is then discretised by means of an analog-digital converter (6) in order to obtain a corresponding digital signal. The amplified signal is then sampled at a relatively low scanning rate, said scanning rate being in the Nyquist frequency range, or even lower than the same. The signal which is discretised in the above manner is then filtered by means of a digital high pass filter (8) and is equalised by means of a digital cable approximation filter (9) in order to compensate the distortion occurring during the transmission via the transmission line. A regenerated clock pulse is obtained from the digital signal processed in this way, by means of a phase-locked loop (14, 18), and the originally transmitted data (DATA) is recovered synchronously with said clock pulse.
Abstract:
The invention relates to a line driver (3) for conducting data transmissions with high bit rates, particularly for conducting wire-bound data transmissions in the full-duplex method. The line driver comprises a differential pair with differential pair transistors (14, 15) for generating transmit pulses according to the data to be transmitted, whereby the transmit pulses are output to the data transmission line (8, 9), which is connected to the line driver (3), preferably via cascode transistors (16, 17) that respectively form a cascode circuit with the differential pair transistors (14, 15). In order to simulate the behavior of the differential pair, a replica differential pair is provided with replica differential pair transistors (18, 19) that generate replica pulses, which correspond to transmit pulses and which can be fed via replica cascode transistors (20, 21) to a hybrid circuit (6) for carrying out echo compensation with regard to pulses received over the data transmission line (8, 9).
Abstract:
The invention relates to a transmitter for transmitting digital data over a transmission line (10). Said transmitter comprises a current-generating digital/analog converter (1) connected to the input of the transmitter, a current-controlled shaping filter (2) for shaping the current pulses delivered by the digital-analog converter, a line driver (5) which carries out a current-voltage conversion and an offset compensation circuit (6) arranged in a feedback path (11). In order to improve the quality of the pulses transmitted to the output of the transmitter, the internal signal processing in the transmitter is carried out based on current.
Abstract:
The invention relates to a method and a device for reconstructing data pulsed with a symbol rate from a signal which was distorted as a result of transmission over a transmission link, wherein the inventive method or the device is preponderantly carried out by means of digital circuit technology or consists of said technology and is designed to improve the quality of data retrieval. The inventive method involves amplifying the signal amplitude attenuated by the transmission; filtering high frequency noise frequencies above the symbol rate; discretizing the analog signal by means of an analog/digital converter (3); executing cable approximation by means of a digitally configured cable approximation filter (7) in order to obtain an equalized signal and recovering the data from the equalized signal using a phase locking loop (20).
Abstract:
The chip (100) has a memory cell array (103) for reading of data, and an input circuit (102) for supplying of control signal for the memory cell array depending on externally received command data. An output buffer (107) is provided for buffering the data that are read from the memory cell array. A timer (104) is designed to control the output buffer so that the output buffer releases the buffered data in an adjustable time interval after supply of the control signal. Independent claims are also included for the following: (1) a memory controller for operating two integrated memory chip (2) a method for operating two integrated memory chip (3) a method for operating a memory controller.
Abstract:
The unit (1) has phase adjustment unit to adjust a sampling time in a center of a received data bit stream. The adjustment unit has a binary phase detection unit for detecting an average phase difference between the stream and a rotated reference phase signal. A data recognition unit has a comparator unit to compare summed up data samples with a threshold value to detect a logic value of a data bit within the stream. An independent claim is also included for a method for clock and data recovery of a received serial data bit stream.
Abstract:
The arrangement has a commutator (1) for oversampling the received signal (S) so that several sample values of a bit cell transmitted with the signal are distributed successively to several output ports and output as intermediate signals, two stages (5,6) for combining first and second groups of intermediate signals to form data and clock recovery signals and a phase regulator (7,8) for setting sampling phases for oversampling the received signal.
Abstract:
A semiconductor memory module includes a plurality of semiconductor memory chips. Each semiconductor memory chip includes an interface circuit that is configured to detect a transmission error in a write datum and is further configured to output, via a separate signal path, a repeat request signal for the repeated transmission of the write datum detected as erroneous. This repeat request signal can be transmitted either as a single-bit signal or as a multibit signal (e.g., serially as an individual signal line to a superordinate memory controller).
Abstract:
One embodiment of the present invention provides to a memory device adapted to receive data according to a write clock signal and to output data according to a read clock signal, comprising a clock port configured to output the read clock signal and to receive the write clock signal and a serial bidirectional driver configured to output the read clock signal via the clock port and to receive the write clock signal via the clock port simultaneously.