Abstract:
PROBLEM TO BE SOLVED: To decrease possibility that voids are formed in an interface between a connector and an electric line. SOLUTION: Apparatus that electrically connects two conduction lines 1, 2 in an integrated circuit has a first conductive connector 3a between the two lines. The apparatus further has additional interfaces 3b to 3g or 6a to 6f for one of two lines, the faces being different from interfaces between the first connector and the lines, parallel to the direction along which electric current for the line flows, and different from a lateral interface between an insulating material and the line. The additional interfaces are disposed at a position in a substantially smaller distance than width of the line from the first connector 3a. The additional interfaces are obtained by disposing second electrically-conductive connectors 3b to 3g between the two lines 1, 2, or disposing ribs 6a to 6f on the line, or disposing cut on at least one of the faces of the line. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To disclose a receiver in which a signal modulated in a transmission band to be transmitted on a coaxial cable is generated by receiving several initial signals to be modulated in a same initial frequency band and/or distinct initial frequency bands. SOLUTION: The receiver is provided with a selector capable of selecting several signals from among the received signals, a mixer capable of transforming the selected signal into a signal at least partly in the transmission band for each selected signal, a filter capable of extracting from the transformed signal a signal associated with a portion of the transmission band from among several at least partly distinct portions of the transmission band, and a means for forming the signal modulated in the transmission band from signals associated with the transmission band portions. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for MC/CDMA transmission of data between nodes of a network. SOLUTION: The method includes assigning to each node at least one spread matrix, a set of data of at least one datum to be transmitted by a node being multiplied by the spread matrix which is associated therewith and the product being then transmitted on a group of carriers in at least one predetermined set of sampled forming at least one OFDM symbol, forming symbols to be transmitted all having the same duration, whatever the transmit node, and adding to each transmitted symbol a cyclic prefix(PF) and a cyclic suffix(SF) representing a predetermined number of samples, respectively of the end and of the beginning of the symbol.
Abstract:
PROBLEM TO BE SOLVED: To provide a new switching circuit which requires no filter by including a gate turn-off thyrister so biased as to be on at always and further including a controllable switch and a capacitor connected in parallel between a gate and a supply line. SOLUTION: An electric power supplied between terminals 2 and 3 from a supply voltage source Vac, a main line voltage 220 V for example, is tried to be limited between both ends of a load 1. For this purpose, a switching circuit 9 is used. The switching circuit 9 comprises a switch 5, a resistor R1, a reference diode Z, and resistor bridges R2 and R3. Further, a capacitor C' is included parallel to a transistor T. The switching circuit 9 is formed to be monolithic, except for the capacitor C', in a first conductive type, N-type for example, semiconductor substrate, for example a silicon. COPYRIGHT: (C)2000,JPO
Abstract:
PROBLEM TO BE SOLVED: To mask a secret key K 0 to protect a DES cryptographic method from an SPA attack, and to provide respective different updated derivative calculation keys M' 1 , M' i in each implementation of the method. SOLUTION: Each step in the DES method has a multiple-key calculation step ET2 for calculating the updated derivative keys M' 1 , M' i from a derivative key calculated previously, based on a known key calculation method during a prior key calculation step. The first updated derivative key M' 1 is acquired from the secret key K0. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To protect a component from a physical attack for acquiring information on an encryption key, from the power consumption of the component or from electromagnetic radiation by implementing an encryption method. SOLUTION: The invention comprises N cycles of calculation successively carried out to obtain an output from an input and a secret key. The invention is characterised in that it consists in: producing a first masking level to mask the input so that each data used or produced by a cycle of calculation should be masked, and producing a second masking level to mask data manipulated within each cycle of calculation. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To correct mismatches between I and Q channels. SOLUTION: The present invention relates to a method for correcting mismatches between a digital signal in phase and a digital signal in quadrature originating from a signal broadcasted by a terrestrial channel, and including a phase correction method. A set of first error values is measured during a first period. A current value of a second error is determined based on a sum of the first error values. The current second error value is compared with a previous second error value stored in a memory. The value of a current phase shift correction is chosen from two phase shift correction values, based on the result of the comparison and the value of a previous phase shift correction. The value of the chosen current phase shift correction is added to the previous phase shift to obtain a current phase shift. This current phase shift is introduced between the digital signal in phase and the digital signal in quadrature. The current second error value and the current phase shift correction value are stored in the memory. These steps are repeated. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for protecting a transistor for controlling the supply of an at least partially inductive load. SOLUTION: The present invention relates to a circuit for protecting a transistor including at least one break-over component inserted between a first conduction terminal and a control terminal, in serial inverse connection with a unidirectional conductor and the circuit includes: a resistor in series with the break-over component; and a controllable current source between a terminal of the unidirectional conductor, opposed to the transistor, and a second conduction terminal of the transistor. The current source is controlled by a current in the transistor. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a motion estimating method and apparatus for processing an image to be inserted between a preceding source image and a succeeding source image in an image sequence. SOLUTION: Each image is divided into pixel blocks related to a motion vector. With respect to the present block of an image under processing, a vector related to the block of the image under processing and/or a vector related to a block of a processed image is selected (step 101). Candidate vectors are generated from the selected vector (step 102). Errors are calculated for each candidate vector (step 103). Penalty is determined, based on the value of a pixel of a pixel block which is in the preceding source image and in which candidate motion vectors point out the current block therefrom and/or based on the pixel value of a pixel block which is in the succeeding source image and is pointed out from the current block by candidate motion vectors (step 104). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To optimize demodulation of an RF signal, especially the increase possible transmission flow to a given clock frequency. SOLUTION: In a method and a circuit for determining a binary state supported by an analog symbol, sampling of the symbol is performed with a sampling signal based on a frequency, having a period shorter than the duration of the symbol. A number of significant samples, smaller than the number of samples which would be obtained with a sampling of the symbol at said frequency, are selected, and the symbol state is determined, based on the samples selected. COPYRIGHT: (C)2006,JPO&NCIPI