Abstract:
A highly stable piezoelectric oscillator includes a heat-generating component mounted on a base printed circuit board; an erected printed circuit board placed upright on the base printed circuit board by fitting a fitting end part in a fitting slit that is formed to penetrate the base printed circuit board; a piezoelectric resonator which is disposed horizontally and directly on the heat-generating component on the base printed circuit board and whose lead electrode part is connected and fixed on the erected printed circuit board; and an oscillation circuit component to obtain an oscillation output using the piezoelectric resonator as a frequency source. Further, connection pads are arranged opposite from each other on surfaces of the base printed circuit board along both opposing end edges of the fitting slit; arc-shaped side through holes are provided on the inner walls of the fitting slit that correspond to each of the connection pads; and lead pads are arranged so as to have positional relations to their respective connection pads on both surfaces of the fitting end part of the erected printed circuit board; and each connection pad having the side through hole is soldered to each lead pad of the fitting end part.
Abstract:
A three-dimensional circuit module has a three-dimensional structure in which a second board is bonded to a first board at a predetermined angle. The first board has a first notched concave part formed at an edge to be a bonding surface S1 and a second notched concave part formed at an edge of the first notched concave part in the depth direction thereof. The second board has an electronic component mounted on a surface thereof opposite to the bonding surface of the first board and is engaged with the first notched concave part in a state in which the electronic component is disposed in the second notched concave part.
Abstract:
A PCB assembly includes a main PCB having an accommodating slit part penetratingly formed therethrough and at least one main terminal part disposed at sides of the accommodating slit part, and a sub PCB having an inserting part which is insertable into the accommodating slit part, the sub PCB including a sub terminal part disposed to correspond to the main terminal part, and a through slot formed in the inserting part along an inserting direction of the sub PCB. Accordingly, the PCB assembly stably combines the sub PCB and the main PCB.
Abstract:
A full bridge circuit including four switching elements (Q1 to Q4) is alternated with a high switching frequency and a series-connected resonance circuit (5) including an inductor (L2) and a capacitor (C2) is made to resonate at a switching frequency of the full bridge circuit multiplied by an integer (for example, frequency multiplied by three), thereby generating a high voltage pulse for start up. After a high-pressure discharge lamp (DL) is started up, the full bridge circuit is alternated with a low switching frequency so as to operate as a step-down chopper for inverting the output polarity, thereby stably supplying rectangular wave voltage of low frequency to the high-pressure discharge lamp (DL) via a filter circuit including an inductor (L1) and a capacitor (C1).
Abstract:
A routing element for use with a multichip module that includes a substrate that carries conductive traces that provide either additional electrical paths or shorter electrical paths than those provided by a multichip module substrate. The conductive traces may be carried upon a single surface of the routing element substrate, be carried internally by the routing element substrate, or include externally and internally carried portions. The routing element also includes a contact pad positioned at each end of each conductive trace thereof to facilitate electrical connection of each conductive trace to a corresponding terminal of the substrate or to a corresponding bond pad of a semiconductor device of the multichip module. Multichip modules are also disclosed, as are methods for designing the routing element and methods in which the routing element is used.
Abstract:
An optical transceiver module includes a first Printed Circuit Board having a first function circuit connected with the electrical interface and a second Printed Circuit Board having a second function circuit that is electrically connected with the first function circuit. The second Printed Circuit Board is disposed substantially perpendicular to the first Printed Circuit Board.
Abstract:
In a camera according to the present invention, an edge portion of a lens barrel unit is projected and arranged from a front cover. The lens barrel unit is covered with a front cover cylindrical member connected to the front cover, and a front exposed portion of the front cover cylindrical member is covered with an exterior cylindrical member as a detachable (before-attaching) metal cylindrical member. The exterior cylindrical member is positioned and is fixed by an stop claw on the front-cover side. A C-shaped stop portion cover having flexibility is made flexible and is attached around the stop claw portion, and is fixed by a screw. The restriction on design is reduced on the appearance for covering the lens barrel unit of the camera, and a camera exterior portion can be made of metal.
Abstract:
A routing element for use in a semiconductor device assembly includes a substrate that carries conductive traces that provide either additional electrical paths or shorter electrical paths than those provided by a carrier substrate of the semiconductor device assembly. The conductive traces may be carried upon a single surface of the routing element substrate, be carried internally by the routing element substrate, or include externally and internally carried portions. The routing element may also include a contact pad positioned at each end of each conductive trace thereof to facilitate electrical connection of each conductive trace to a corresponding terminal of the substrate or to a corresponding bond pad of a semiconductor device of the multichip module. Multichip modules are also disclosed, as are methods for designing the routing element and methods in which the routing element is used.
Abstract:
A solid-state lighting system (10) has a carrier (12 or 12a) having at least two electrically conductive traces (14, 16) thereon; and at least one module (18) carrying at least one solid-state light source (20) mounted with the carrier. The module (18) has electrical conductors (22, 24) in contact with the electrically conductive traces (14, 16) on the carrier. The carrier (12 or 12a) is elongated and the at least one module (18) has a horizontal aperture (26) therethrough with the electrical conductors (22, 24) extending at least into the aperture. The module (18) is slidably mounted upon the carrier (12 or 12a) with the carrier penetrating the horizontal aperture (26) and the electrical conductors (22, 24) in engagement with the electrical traces (14, 16).
Abstract:
In the state where a terminal forming portion of a flexible circuit board is inserted through a first insertion hole formed in a main frame and a second insertion hole formed in a main printed circuit board, the terminal forming portion is bent so as to confront a back surface of the main printed circuit board. A terminal portion of the terminal forming portion is connected, by soldering, to a circuit pattern formed on the back surface of the main printed circuit board.