Abstract:
A panel board has a first voltage layer sandwiched between two ground layers at a close spacing to produce a large distributed capacitance; the two ground layers are connected by plated-through conductive holes spaced regularly across the board; a second (exposed) voltage layer is connected by regularly spaced plated-through holes to the first voltage layer, increasing the current carrying capacity of, and reducing the resistance across, the board; the plated-through holes are arranged in rows and columns in a pattern permitting the mounting of decoupling capacitors, at any point on the board, in a position parallel to the rows or parallel to the columns; and a socket terminal can be electrically connected directly to the exposed voltage layer or to the exposed ground layer using a ring connector.
Abstract:
A multilayer printed circuit board for TTL logic components provides an approximate 100 ohm characteristic impedance between external microstrip signal lines and internal ground and voltage planes. The addition of two internal microstrip signal plane lines permits a much greater interconnectability capability and also saves a large percentage of spatial area for component mounting while still maintaining the 100 ohm impedance characteristic.
Abstract:
What is described is an electronic device (1) comprising a power component (3) and a printed circuit board (2) . The power component comprises a main body (30) and a lead (31) . The printed circuit board comprises at least two conductive layers (21) parallel to a plane xy, a mounting element (23) and a conductor (24) . The mounting element and the conductor respectively comprise first (23b) and second (24b) conductive tubes, which elongate through a thickness of the printed circuit board along a direction z substantially perpendicular to the plane xy. The main body of the power component is fixed to the mounting element, while the lead thereof is fixed to the conductor.
Abstract:
A substrate (1) for a portable data carrier (10) comprises an electrical component (2, 3), such as an antenna, which has two parts applied on mutually opposite surfaces of the substrate (1). The parts of the electrical component (2, 3) comprise an electrically conductive material and are electrically conductively connected to one another in through-plating regions (4, 5, 6, 7) of the substrate (1) through perforations (8, 13) of the substrate (1). The perforations (8, 13) are produced by means of a laser and have a maximum width of a maximum of 20 μm. A through-plating region (4, 5, 6, 7) preferably has a multiplicity of perforations (8, 13) distributed over the through-plating region (4, 5, 6, 7).
Abstract:
An electronic device comprises a housing having an outer face and an inner face. A key is provided on the housing, which comprises a micro hole formed in the housing and a conductive material extending within the micro hole to the outer face of the housing. A sensor is coupled to the conductive material to detect whether an object is brought into contact or out of contact with the micro hole at the outer face.
Abstract:
A filter unit and a corresponding printed circuit board. The filter unit and the printed circuit board have been equipped with modified end portions being matched such that a number of filter units can be used on the printed circuit board without changing the printed circuit board.
Abstract:
An hermetically sealed integrated microwave circuit comprising a coplanar waveguide on a PCB (3, 4) electrically connected on one major surface to an IC, and thermally and electrically connected to a BGA (5) on its opposite major surface, in which the PCB has at least first and second printed layers, a microwave signal path extends from a ball of the BGA through a through-hole in both printed layers to the coplanar wave guide, and plural ground paths extend from balls (51) of the BGA (5) through first through-holes in the first printed layer of the PCB and through second through-holes of the second printed layer of the PCB, the first and second through-holes being non-coincident, to allow for an hermetic seal across the PCB whilst introducing a predetermined impedance in the PCB between the signal and ground paths.