摘要:
A light emitting device of the present invention includes: a substrate including wire patterns separated from each other on a basic material and a runner section to which sealing resin is poured, which runner section is a space between the wire patterns; a light emitting element die-bonded on the substrate; and a resin section in which the light emitting element is sealed using the sealing resin poured via the runner section.
摘要:
A resin molding die includes: a cavity; a resin inlet through which a liquid resin to be cured is injected into the cavity; and an air vent through which air is released to an exterior space of the resin molding die during injection of the resin, the air vent being provided on an opposite side from the resin inlet with respect to the cavity.
摘要:
A resin molding die includes: a cavity; a resin inlet through which a liquid resin to be cured is injected into the cavity; and an air vent through which air is released to an exterior space of the resin molding die during injection of the resin, the air vent being provided on an opposite side from the resin inlet with respect to the cavity.
摘要:
The present invention involves connectors for reducing Far-End Crosstalk (FEXT) through the use of novel polarity swapping to negate the cumulative effect of FEXT. Skew adjustment is used to improve the FEXT cancellation from polarity swapping. The polarity reversal location or locations among FEXT sources are optimized to achieve maximum FEXT cancellation. The novelty polarity swapping technique can be applied to a wide variety of connectors, such as mezzanine connectors, backplane connectors, and any other connectors that can benefit from FEXT reduction.
摘要:
An electrical connector for a circuit board is provided with a relay member connection body and a relay member receiving body. The relay member connection body is provided with terminals and a terminal holding body to hold the terminals. The relay member receiving body is fitted into the relay member connection body and receives a relay member that is to be connected with the terminals. The relay member receiving body is provided with receiving grooves extending in the assemble direction to receive the relay member. One end side of the terminal is held, and a contact portion elastically bendable inward of the receiving groove is provided in the other end side of the terminal. A distal portion of the terminal on the other end side abuts against the relay member receiving body, so that the terminals receive pre-compression in an elastically bending direction of the contact portion.
摘要:
Twin cylinder two cycle engine including a pair of stepped cylinders and a pair of stepped pistons slidable in said cylinders defining annular spaces of variable volume in said cylinders. The pistons are interconnected each other with 180.degree. phase difference. Air-fuel mixture introduced into the annular space in one cylinder is forced into the crankchamber of the other cylinder during the upward stroke of the associated piston, so that an additional charge is provided.
摘要:
A low density parity check codes decoder decodes an LDPC code with an arbitrary coding rate by the same configuration. The low density parity check codes decoder enables decoding of an LDPC code constituted by a base matrix of Mbmax rows and Nbmax columns and a permutation matrix as an element of the base matrix. It stores therein Mbmax×Nbmax validity/invalidity flags, shift amounts of valid permutation matrices, a permutation matrix size in a processing target code, and the number of rows of a base matrix in the processing target code, determined depending on a check matrix for the processing target LDPC code, and generates column addresses and a row address to be given to column processing calculation sections and a row processing calculation section that perform calculation in accordance with a BP algorithm by utilizing the stored information, so that it can process an LDPC code for a smaller base matrix than the aforementioned base matrix as well.
摘要:
It is an object of the present invention to provide a low density parity check codes decoder that can decode an LDPC code with an arbitrary coding rate by the same configuration. The low density parity check codes decoder according to the present invention is configured to enable decoding of an LDPC code constituted by a base matrix of Mbmax rows and Nbmax columns and a permutation matrix as an element of the base matrix. It stores therein Mbmax×Nbmax validity/invalidity flags, shift amounts of valid permutation matrices, a permutation matrix size in a processing target code, and the number of rows of a base matrix in the processing target code, determined depending on a check matrix for the processing target LDPC code, and generates column addresses and a row address to be given to column processing calculation sections and a row processing calculation section that perform calculation in accordance with a BP algorithm by utilizing the stored information, so that it can process an LDPC code for a smaller base matrix than the aforementioned base matrix as well.
摘要:
An intermediate electrical connector comprises a circuit board (10) having a plurality of contact portions (11) arranged on opposed edges thereof to which two connectors are attached in opposed directions, respectively, and a pair of supported portions (13, 14) provided at ends thereof in an arrangement direction of the contact portions. The intermediate electrical connector further comprises a guide member (20) holding the circuit board and having a support portion (21) which is brought into contact with an face of the circuit board and a pair of columns (22,13) each having a holding portion (24, 25). The supported portion has an asymmetric shape and the holding portions has a corresponding shape for receiving the asymmetric shape of the supported portion.