Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Olympus Medical Systems Corporation

Motoyoshi Kitagawa

Akira Mishima

Hiroyuki Yamada

Kazuki Honda

Masatoshi Homan

Mitsukazu Kuze

Susumu Fukushima

Junichi Kimura

Eiji Kawamoto

Kazuhiko Honjo

Shigeharu Sumi

Masaaki Noda

Toshihiro Furusawa

Shinji Harada

Atsuhito Terao

Masashi Yasuda

Takashi Umeda

Terumoto Akatsuka

Junichi Fukutani

Keisuke Utsunomiya

Tomoya Takenaka

Toao Ishida

Kohei Tanaka

Yoshimasa Gannyo

Haruki Owaki

Toshihiko Mori

Kenzo Ito

Yasuteru Asakawa

Jun'ichi Kimura

A loudspeaker includes a frame, a diaphragm, an edge connecting portion, a magnetic circuit having a magnetic gap, and a voice coil body. The edge connecting portion connects an outer peripheral end portion of the diaphragm and the frame to each other. The diaphragm is disposed inside of the frame. The diaphragm has a planer diaphragm and a reinforcing diaphragm. Both a front surface and a rear surface of the planer diaphragm are flat. The reinforcing diaphragm includes a thick portion and a recessed portion, and is joined to the planer diaphragm. The reinforcing diaphragm is made of resin. The thick portion is formed on an outer periphery of the reinforcing diaphragm. The recessed portion is formed at a center side of the reinforcing diaphragm.

Loudspeaker and mobile body device having loudspeaker mounted thereon

The printed wiring board (PWB) includes (a) a fluid-resin embedding section formed at a location corresponding to electronic components such that the embedding section covers the electronic components, (b) a resin flow-speed accelerator placed in parallel with a top face of a circuit board and surrounding the embedding section, and (c) bonding resin placed at least between the accelerator and the circuit board. The fluid resin embedding section is filled up with the same resin as the bonding resin. This structure allows the accelerator to compress the resin with pressure applied to the PWB, so that the resin tends to flow along the circuit board. As a result, the fluid-resin embedding section is thoroughly filled up with the resin without leaving any air, and the reliable PWB is thus obtainable.

Method of manufacturing component-embedded printed wiring board

A radio-frequency signal receiver and its manufacturing method are disclosed. A tuner receives a radio-frequency signal, and a demodulator receives an output signal from the tuner. An error corrector receives an output from the demodulator. A determiner determines whether or not an error rate supplied from the error corrector is not less than a predetermined rate. A controller receives an output from the determiner, and based on the determination, the controller controls a plurality of sections forming the radio-frequency signal receiver. The controller controls selectively one of the plurality of sections, thereby lowering the error rate. A manufacturing method of this receiver makes a memory, coupled to the controller, store a shift-amount of frequency corresponding to an interference signal in a pass-band of a narrow-band filter.

Radio-frequency-signal receiver and method of manufacturing the same

A level comparator supplied with oscillation signal of local oscillator for comparing the signal level of oscillation signal with a certain predetermined threshold value, and a driving section interposed between the output of level comparator and a control section are provided. When the level comparator recognized that the signal level exceeded the threshold value, it puts the driving section into operation for bringing the control section into action.

RF receiving apparatus

A high frequency receiver capable of stably canceling interference by a transmission signal even if a transmission signal input from a TV antenna is changed. Phase shifter () for changing a phase of an interfering distributed transmission signal, detector () for detecting a level of a transmission signal included in a receive signal input via an antenna, and level regulator () for changing a level of the distributed transmission signal in accordance with this level are provided. A signal input via level regulator () and phase shifter () and a receive signal are synthesized to be input into mixer (). Since a transmission signal can be cancelled even if a transmission signal input from an antenna is changed, a high frequency receiver can receive a signal stably when a transmission signal is changed.

Apparatus and method for interference canceller in a high frequency receiver and transmitter

A multilayer module includes a parts-containing module whose circuit board has been mounted at one surface with an electronic component and the electronic component is covered with a resin layer. Connection terminals are provided either at the resin layer or at the other surface of the circuit board, and a through hole is provided for connection between the two surfaces of the module. Also included is a module, which is provided with connection terminals at a place corresponding to the connection terminal, and the through hole for connection between the connection terminals and electronic component. An insulation layer is disposed between conductor layers, the insulation layer having a conductive bond for connection between connection terminals, respectively. Locations of a through hole and an electronic component in the module are not restricted by a location of the through hole.

Multilayer module and method of manufacturing the same

A portable power amplifier includes portable encapsulating cases, a printed board incorporated in those encapsulating cases, and a power amplifying device mounted on this printed board. An antenna switch and an antenna are provided near the power amplifying device, which is connected to those components in a pattern. This structure improves heat dissipation efficiency of the portable power amplifier.

Portable power amplifier

High-frequency device

A high frequency apparatus for receiving digitally modulated high frequency signals withstands vibration and has a simple tuning adjustment. The apparatus has an input terminal, a mixer which mixes the input signals and an output signal from a local oscillator, a voltage controlled oscillator which includes the local oscillator, an oscillating section, a movable conductive member and, a gluing agent for maintaining an adjusted state, and a control loop having a high loop band width which is large enough so that noise of the local oscillator is not dominated by noise of the voltage controlled oscillator.

Tuner for PSK or PAM data applications

In order to provide a small-sized card and a connector device therefor having no fear of damages and stains of terminals, the card according to the invention has a structure comprising a casing with an opening, and a double-faced substrate on which electronic parts are provided and a plurality of terminals are attached in the vicinity of one end of the substrate, in which the terminals are provided on both the upper and lower surfaces of the substrate, the lower surface of the substrate is disposed in contact with the inner surface of the casing, the terminals on the lower surface of the substrate are covered with a cover which is swung or slid to be opened/closed freely, so that when the card is inserted in a connector device, the cover is opened to expose the lower-surface terminals and to fit them closely in a connector of the connector device.

Electronic card and connector device therefor

A shielded high-frequency apparatus has a partitioned shielding case with a printed circuit board mounted therein. The partitioned shielding case is formed of a plurality of mutually intersecting shield plates which are attached within a frame to form a plurality of shield chambers. The partitioned shielding case is manufactured by first forming a solder resist film over the partitioned plate surfaces other than at specific end regions of the partition plates and over the frame internal surface other than at positions immediately adjacent to the end regions of the partition plates when the partitioned shielding case is assembled. The partition plates are then mounted in the frame, solder is next applied to the regions from which the solder resist film was omitted. Secure attachment of the partition plates and ease of implementation of automatic manufacture are attained, with reduced manufacturing costs.

Shielded high frequency apparatus having partitioned shield case, and

Growing community of inventors

Gifu, Japan

Motoyoshi Kitagawa