摘要:
Disclosed is a semiconductor device which is intended to reduce the total number of storage element blocks that constitute a desired logic circuit. The semiconductor device includes N address lines (N is an integer equal to two or more), N data lines, and a plurality of storage sections. Each of the storage sections includes an address decoder for decoding an address supplied via the N address lines to output a word select signal to word lines; and a plurality of storage elements which are connected to the word lines and the data lines, each store data that constitute a truth table, and input or output the data via the data lines in accordance with the word select signal supplied via the word lines. The semiconductor device is adapted such that the N address lines for the storage sections are connected to the respective data lines of other N ones of the storage sections, while the N data lines for the storage sections are connected to the respective address lines of other N ones of the storage sections.
摘要:
FPGAs and MPLDs, which are conventional programmable semiconductor devices, have had poor cost performance and did not suitably take long signal lines into account. To solve this, a flip-flop is built into each MLUT block comprised of a plurality of MLUTs, each MLUT comprising a memory and an address-data pair. With respect to the adjacent line between adjacent MLUTs, alternated adjacent line are introduced, while in the case of interconnects between non-adjacent MLUTs, dedicated distant line and, furthermore, a torus interconnect network are provided.
摘要:
A double-talk detector finds an estimated power value of near end background noise based on a residual signal by a noise estimator; the average power of a transmitter input signal by a transmitter average power calculator; the average power of a receiver input signal by a receiver average power calculator; and an estimated echo path attenuation value through a predetermined echo path attenuation value estimating process based on the estimated power value of the near end background noise, the average power of the transmitter input signal and the average power of the receiver input signal by an attenuation value estimator. The double-talk detector detects a double-talk state based on the estimated echo path attenuation value, the average power of the transmitter input signal and the average power of the receiver input signal by a double-talk determiner to control update of the coefficient of an adaptive filter.
摘要:
A jitter buffer control apparatus has a buffer for storing data included in an input packet transmitted from a telecommunications network, and a jitter buffer controller for controlling the buffer to store the input data into the buffer and take out the stored data from the buffer on the basis of a sequence number included in the input packet in a processing period. When under-running occurs in the buffer, the jitter buffer controller stores input data into the buffer with a storage location skipped which corresponds to the processing period associated with packet loss due to the under-running.
摘要:
A redundancy gateway system that can avoid short interruption of data communication caused by system switching in gateway units configured in a multiplex manner for a plurality of systems, and that can maintain the communication state prior to the system switching and avoid degradation of communication quality. A duplicate of a received packet is generated, thereby supplying the packet of the same content to a configuration of gateway units. For each packet, a common write pointer corresponding to identification information appended to the packet is generated. Each gateway unit writes the packet to its own jitter buffer in accordance with the common write pointer corresponding to each supplied packet, sequentially reads out the written packet from the jitter buffer, and generates a TDM signal. One of the gateway units is selectively switched and only the TDM signal generated by the one gateway unit is supplied to a TDM network.
摘要:
An echo canceler has an adaptive filter that generates an echo replica signal from a far-end signal. The filter coefficients of the adaptive filter are updated according to a residual error signal, which is obtained by subtracting the echo replica signal from a near-end signal to cancel echo. A background noise estimator estimates the near-end background noise power level from the residual error signal. A step size calculator uses the estimated near-end background noise power in determining the step size of the adaptive updating of the filter coefficients. When the estimated near-end background noise level is high, a small step size is used, which improves echo cancellation under these conditions. When the estimated near-end background noise level is low, a larger step size is used to permit rapid convergence of the filter coefficients.
摘要:
There is provided a method or structure of carrying out optical measurement for the change of the state of the reactive sample solution at two or more measurement points of the channel simultaneously and continuously in a flow system reaction in which the reactive proceeds according to the elapsed time for movement. A sample containing nucleic acids is made to flow to a channel of which a temperature control means controlling the temperature of the passing area so that the temperature changes in the repetitive pattern, and the change in the state of the sample containing nucleic acids flowing on the channel is detected by optical detection means at two or more places of the channel. The channel can be placed in the analysis area on the disk driven by rotation, and information of the reactive sample solution in the channel can be detected simultaneously and continuously by optical detection means which is installed facing the disk for nucleic acid analysis. The constitution of the structure allows providing compact device for nucleic acid analysis is provided with a flow system reaction tube of the sample containing nucleic acids and an optical detection means.
摘要:
Provided is a method of producing a printed circuit board. The method comprises preparing a base having a plurality of through via conductors having through holes, filling the through holes of the through via conductors with resin paste by printing in such a manner that, of the through holes, those which are arranged at smaller intervals are filled with a smaller amount of resin paste than those which are arranged at larger intervals, curing the resin paste, and removing an unnecessary portion of resin resulting from the curing of the resin paste. A mask used for carrying out the filling by printing is also provided.
摘要:
An optical information recording medium comprising a light transmitting substrate, a light absorptive layer containing at least one light absorbing substance formed on the substrate and a light reflective layer made of a metal film formed on the light absorptive layer, wherein an optical parameter represented by &rgr;=nabsdabs/&lgr; wherein nabs is the real part of the complex refractive index of the light absorptive layer, dabs is the average thickness of the light absorptive layer and &lgr; is the wavelength of a reading laser beam, is 0.6
摘要:
An optical information medium comprises an optically transparent substrate and a protective layer formed on the substrate for protecting a record portion so that information which is optically readable by means of a laser beam can be recorded. A hydrophilic film is formed at a side opposite to a side through which reproduction light of the optically transparent substrate is passed. The film has a hydrophilic surface on which an aqueous printing ink is fixable. Printing is possible on the hydrophilic surface by use of an ink jet printer. A method for printing on the hydrophilic surface is also described.