Abstract:
An optical transmission system for optically transmitting information between apparatuses via an optical transmission path. The system includes: a sending unit that emits, to the optical transmission path, excitation light for detecting an inter-apparatus connection via the path; a responding unit that receives the excitation light from the path and emits detection light to the path using light energy of the excitation light; a response receiving unit that receives the detection light from the path and outputs a detection light current; a detecting unit that detects presence/absence of the inter-apparatus connection based on the detection light current; a light signal transmitting unit that emits, to the path, a light signal for optically transmitting the information based on the detection result by the detecting unit; and a light signal receiving unit that receives the light signal from the path.
Abstract:
A shoe midsole has a sole plate, a plurality of blades integrally standing on the sole plate, a cover bonded to the circumference of the sole plate, and a fluid sealed between the sole plate and the cover. A first concave part in a shape equivalent to a sole of a foot is formed on the surface of the sole plate, on which the plurality of blades stand, wherein the plurality of blades are accommodated within the first concave part. The plurality of blades are aligned at a predetermined interval in a direction nearly orthogonal to the longitudinal direction of the sole plate, and some of the plurality of blades are tilted toward the toe.
Abstract:
A high-frequency switch module includes a first switching element and a second switching element. A common terminal of the first switching element is connected to an antenna. A common input terminal of the second switching element is connected to a multi-band power amplifier. A second individual output terminal of the second switching element is connected to a fourth individual terminal of the first switching element via a first low-pass filter, and is connected to a third individual terminal of the first switching element via a series circuit including a second low-pass filter and a high-pass filter. A first individual output terminal of the second switching element is connected to a first individual terminal of the first switching element via a phase-shift circuit and a first SAW duplexer, and is connected to a second individual terminal of the first switching element via the phase-shift circuit and a second SAW duplexer.
Abstract:
A serial-parallel conversion circuit provided on one end of a cable body converts a first serial signal into parallel signals and outputs the parallel signals to parallel signal lines. A parallel-serial conversion circuit provided on another end of the cable body converts the parallel signals inputted from the parallel signal lines into a second serial signal and outputs the second serial signal to outside.
Abstract:
A card controller receives data from a recording card via a socket. A read clock is transmitted in a main transmission wiring, and the data is transmitted in a data transmission wiring. The read clock is withdrawn from the card controller by an outgoing transmission wiring and retrieved into the card controller by an incoming transmission wiring. A transmission delay amount of the outgoing transmission wiring is equal to that of the main transmission wiring, and a transmission delay amount of the incoming transmission wiring is equal to that of the data transmission wiring. The card controller receives the data in synchronization with the read clock retrieved by the incoming transmission wiring.
Abstract:
A device and method for encrypting content in an encryption device including a content-key storage section is disclosed. The method includes generating a content-key used for encrypting content based on random numbers and storing the generated content-key in the content-key storage section, encrypting the content-key used for encrypting the content so as to obtain an encrypted content-key and outputting the encrypted content-key to outside of the encryption device, determining whether or not a value of the content-key storage section in its initial state and a current value of the content-key storage section are different, and when it is determined that the value of the content-key storage section in its initial state and the current value of the content-key storage section are different, encrypting the content using the current value of the content-key storage section as a content-key so as to obtain a second output data and output the second output data to outside of the encryption device, wherein, for the determination step, a register stores a value of the content-key storage section at the time that said register receives a Power On Reset (POR) signal, and wherein the POR signal is a signal which pulses only once immediately after power-on or immediately after reset, so that the content-key storage section is in an initial state immediately after a corresponding power-on or reset of the encryption device.
Abstract:
A copyright protection system comprises an encryption device and a decryption device. Cryptographic communication is performed between the encryption device and the decryption device using a contents key. The encryption device includes a contents storage section for storing contents, a first contents key generation section for generating the contents key based on a second decryption limitation obtained by updating a first decryption limitation, and a first encryption section for encrypting the contents using the contents key and outputting the encrypted contents. The decryption device includes a second contents key generation section for generating the contents key from the second decryption limitation, and a first decryption section for decrypting the encrypted contents using the contents key generated by the second contents key generation section.
Abstract:
A patch antenna device and an antenna device that are miniaturized while avoiding degradation of radiation characteristics, such as gain and efficiency. A first electrode is formed on a front surface of a rectangular parallelepiped-shaped dielectric substrate. A second electrode is formed on a rear surface of the dielectric substrate. The first electrode is connected through a coaxial cable to a power supply unit. The width W of each of the first and second electrodes is smaller than or equal to a quarter of the length L thereof, and the thickness T of the dielectric substrate is larger than or equal to the above width W. Advantageously, the second electrode is set so as to be longer than the first electrode, and both end portions of the second electrode are bent and arranged on both end surfaces of the dielectric substrate.
Abstract:
A surface acoustic wave device includes a piezoelectric substrate that does not restore the pyroelectric effect, and a method for manufacturing the same. A surface acoustic wave element housed in a package includes a piezoelectric substrate having a specific resistance in the range of about 1.0×107 Ω·cm to about 1.0×1013 Ω·cm. Pads are electrically connected to an external electrode with a solder. The space between the package and a cap of the package is sealed with a sealing material. At least one of the solder and the sealing material has a melting point of about 300° C. or less.
Abstract:
A connection member can be produced without a via-forming step. The connection member includes an insulating substrate which has an upper surface, a lower surface opposed to the upper surface, and a side surface which connects these surfaces; and at least one wiring which extends from the upper surface to the lower surface through the side surface.