Alps Electric Co., Ltd.

Alps Electronic Co., Ltd.

Nippon Steel Nisshin Co., Ltd.

Hitachi Metals, Ltd.

Asahi Kasei E-materials Corporation

Masaki Yamamoto

Toshiro Furuta

Masaaki Endo

Akira Yamamoto

Toshiaki Sato

Ichiro Takahashi

Takeo Suzuki

Tadashi Nakano

Shigeru Osada

Yasuharu Kudo

Masashi Suzuki

Yuusuke Murai

Yoshihiro Sato

Yoshinobu Kurisu

Tsutomu Ohta

Shinichi Kajimoto

Yoshitaka Yukura

Hiroyuki Nakamizo

Noboru Suzuki

Masahiko Tsuchiyama

Yoshinori Kobayashi

Takeshi Sampei

Hirokazu Tsuji

Michinori Sasaki

Sadayoshi Ijichi

Yasuhito Iizuka

Masashi Tabata

Takeshi Shimizu

Koichiro Shimoda

Hiroyuki Sawamoto

Takao Sasaki

Yuuki Sakuraba

Takahide Hayashida

Takashi Nishimura

Fumiaki Miyamitsu

Toyoharu Yasuda

Hideo Nishi

Yoro Sasaki

Mineo Koyama

Hiroaki Adachi

Shuji Kashiwagi

Shinichi Yamamoto

Takumi Uchiyama

The present invention provides a method for manufacturing more beautiful black coated steel sheets by uniformly blackening the coating layer. Specifically, the present invention provides a method for manufacturing black coated steel sheets, which brings Zn&#x2014;Al&#x2014;Mg alloy coated steel sheets () into contact with steam in a closed container (), wherein said closed container () can maintain a predefined internal pressure through variable control of the amount of steam flowing into said closed container () and/or the amount of steam flowing out of said closed container (), and in said closed container () that can maintain said predefined pressure, said Zn&#x2014;Al&#x2014;Mg alloy coated steel sheets () have contact with the steam introduced into said closed container ().

Method and device for manufacturing black coated steel sheets

The present invention enables quick cooling of steam-treated objects and thus reduces the manufacturing time of steam-treated products such as black coated steel sheets. The present invention provides a method for manufacturing steam-treated products, which involves a steam treatment step that introduces steam into a closed container () containing a treatment object () and brings the treatment object () into contact with the steam, and a treated object cooling step that cools the object () treated with steam in the steam treatment step, wherein said treated object cooling step introduces coolant gas into said closed container (), brings said treated object () into contact with the coolant gas, and discharges the introduced coolant gas from said closed container ().

Method and device for manufacturing steam-treated products

A sintered ferrite magnet represented by the general formula of CaLaFeCoZnexpressing the atomic ratios of metal elements of Ca, La, Fe, Co and Zn, wherein x, y, z, and n [2is a molar ratio represented by 2=(Fe+Co+Zn)/(Ca+La)] meet 0.4&#x3c;x&#x3c;0.75, 0.15&#x2264;y&#x3c;0.4, 0.11&#x2264;z&#x3c;0.4, 0.26&#x2264;(y+z)&#x3c;0.65, and 3&#x2264;n&#x2264;6.

Sintered ferrite magnet

A resin composition containing (A) a polyimide having acidic functional groups and (B) a compound having functional groups that react with the acidic functional groups, where (a) a solution rate in 3 mass % aqueous sodium hydroxide at 45&#xb0; C. is 0.95 or more after a heat history of 90&#xb0; C. for 10 minutes with the solution rate before the heat history assumed to be 1, (b) the solution rate in 3 mass % aqueous sodium hydroxide at 45&#xb0; C. ranges from 0.001 &#x3bc;m/sec to 0.02 &#x3bc;m/sec after the heat history of 180&#xb0; C. for 60 minutes, (c) a bleed-out amount is 50 mg/mor less in storing at 40&#xb0; C. for 2 weeks after the heat history of 180&#xb0; C. for 60 minutes, and (d) a thermogravimetric decrease at 260&#xb0; C. is 2.0% or less in measuring on a temperature rising condition of 10&#xb0; C./min from 40&#xb0; C. by thermogravimetric analysis (TG). When a multilayer flexible wiring board is manufactured using the resin composition, it is possible to obtain the resin layer excellent in alkali processability, embeddability in press, heat resistance, bendability, insulation reliability, and adhesion to the conductive layer.

Resin composition, layered product, multilayer printed wiring board, multilayer flexible wiring board and manufacturing method of the same

A wireless power transmission system for wirelessly transmitting electric power from a power transmitting device to a power receiving device using magnetic field coupling between a power transmitting coil and a power receiving coil is provided. The power transmitting device includes a power transmitting circuit generating an electric signal for transmitting electric power, first and second power transmitting coils compatible with first and second transmission methods, respectively, a first magnetic substance on which the first power transmitting coil is placed, a second magnetic substance on which the second power transmitting coil is placed, and a power feeding surface on which the power receiving device is to be placed. First and second attachment surfaces of the first and second magnetic substances, respectively, are located on the lower side of the power feeding surface and arranged on a same plane surface parallel to the power feeding surface.

Wireless power transmission system

The present invention provides a high-frequency circuit capable of acquiring the original transmission characteristics of a filter by preventing capacitive coupling between input and output terminals of the filter externally attached to the integrated circuit and effectively using a mounting space. The high-frequency circuit includes a rectangular integrated circuithaving two long sidesandand two short sidesandand a SAW filter, disposed to be adjacent to the short sideof the integrated circuit, having input terminalsanddisposed on the long sideside and output terminalsanddisposed on the other long sideside. IC output terminalsandconnected to input terminalsandof the SAW filterare disposed on a position of one long sideof the integrated circuiton the SAW filterside, and IC input terminalsandconnected to output terminalsandof the SAW filterare disposed on a position of the other long sideof the integrated circuiton the SAW filterside.

High-frequency circuit in which high-frequency filter is parallel installed to integrated circuit

An AGC circuit is provided which includes a first AGC detector circuit that switches whether the AGC voltage is output or not, a second AGC detector circuit that always outputs the AGC voltage, a first resistor with a high impedance compared to a tuned frequency of which one end is connected to an output port of the first AGC detector circuit and the other end is connected to an output port of the second AGC detector circuit, and a switching element that is provided between the other end of the first resistor and a ground, in which an output source that outputs the AGC voltage to the amplifier can be switched to the first AGC detector circuit or the second AGC detector circuit by an On/Off operation of the switching element.

Automatic gain control circuit

A tuner integrated circuit is connected, in a preceding stage thereof, to an RF amplifier including a UHF dual gate FET and a VHF dual gate FET. In the reception of a signal of the UHF band, a television signal output from the UHF dual gate FET is input to a UHF RF circuit via a UHF multiple-tuning circuit. In the reception of a signal of the VHF band, a television signal output from the VHF dual gate FET is input to a VHF RF circuit via a VHF multiple-tuning circuit. A VHF input terminal of the VHF RF circuit is connected to the ground via between a collector and an emitter of a transistor. In the reception of the signal of the UHF band, the transistor is turned on.

Television tuner integrated circuit and television tuner for attenuating interference signal

A double-tuned circuit includes a primary side tuned circuit having a first air-cored coil and a secondary side tuned circuit having a second air-cored coil. The first air-cored coil and the second air-cored coil are opposed to each other so that one opening end of the first air-cored coil and one opening end of the second air-cored coil are capable of being coupled to each other on a coil mounting surface. The coil mounting surface is provided with a first conductive pattern formed adjacent to the first air-cored coil in a direction perpendicular to an arrangement direction of the first and second air-cored coils, and both ends of first conductive pattern are connected to a ground.

Double-tuned circuit

In a double-tuning circuit including a primary tuning circuit having a first inductor and a first variable capacitive element connected in parallel and a secondary tuning circuit having a second inductor and a second variable capacitive element connected in parallel, a fixed part of a copper-foil pattern is connected to a connection point at which the double-tuning circuit is connected to an input terminal of a frequency mixing circuit, and a tip part of the copper-foil pattern extends to near the first inductor, whereby a trap circuit for attenuating an image frequency component is formed. A pattern is formed between a ground-side terminal of the first inductor and the ground, and a capacitor is connected between a connection point at which the first inductor is connected to one terminal of the pattern and a ground-side terminal of the second variable capacitive element.

Double-tuning circuit of television tuner

Provided is a high frequency unit for suppressing deformation of a mounting plate which needs to be concerned when attaching or detaching an external connector, at low cost and high reliability of a connection between a core of a coaxial connector and a circuit board. The high frequency unit includes: a circuit board on which a high frequency circuit unit is formed, a shield case having a frame shape enclosing the circuit board with a plurality of side walls; a partition wall for partitioning a space on the circuit board; a mounting plate which is made of a rectangular metal sheet disposed to face the circuit board and of which three peripheral portions of an outer edge are supported by the two side walls and the partition wall; a coaxial connector fixed to the mounting plate; and a sheet metal cover covering an upper open end of the shield case.

High frequency unit with improved mounting plate

A television tuner includes an unbalanced output type VHF-side block, a balanced output type UHF-side block, and a mixing circuit that performs frequency conversion on the output from the VHF-side block or the UHF-side block. In the television tuner, in a first mode where the VHF-side block is connected to the mixing circuit, a first terminal, to which the unbalanced output is applied, is coupled to a first input terminal of the mixing circuit, and a second input terminal of the mixing circuit is grounded. Further, in a second mode where the UHF-side block is connected to the mixing circuit, a second terminal and a third terminal, to which the balanced output is applied, are coupled to the first and second input terminals of the mixing circuit.

Balanced and unbalanced electronic circuit and television tuner

A coupling structure between a circuit board and a frame member according to the present invention includes: the frame member made of a metal material; and the circuit board set in the frame member and having a land portion soldered to the frame member, in which a solder reinforcing member that is put on the land portion and is solderable is provided at a corner formed by the frame member and the circuit board, and the frame member, the land portion, and the solder reinforcing member are soldered at the corner.

Coupling structure between circuit board and frame member

There is provided a bias power supply for setting a collector bias current of a mixer transistor and a collector bias current of an oscillation transistor. When a control voltage is equal to or smaller than a first predetermined value, an output voltage of the bias power supply is set to be increased so that at least one of the collector bias current of the mixer transistor and the collector bias current of the oscillation transistor can be increased.

Frequency converter capable of preventing level of intermediate frequency signal from lowering due to rise in temperature

The invention provides a variable tuning circuit capable of extending a variable range in a high frequency band, ensuring the value of L of an inductor to increase the value of Q of a circuit in a low frequency band, and preventing a reduction in gain, an increase in noise, and unstable oscillation. A variable tuning circuit includes: a first parallel resonance circuit that includes a varactor diode, a capacitor connected in series to the varactor diode, and a first inductor connected in parallel to the varactor diode and the capacitor; and a second parallel resonance circuit that includes a second inductor connected in parallel to the varactor diode with a direct current cut-off capacitor interposed therebetween. When the varactor diode has a maximum capacitance, a resonant frequency of the second parallel resonance circuit is set about a lowest frequency in a variable frequency range.

Variable tuning circuit using variable capacitance diode and television tuner

Growing community of inventors

Fukushima-ken, Japan

Masaki Yamamoto