Abstract:
PROBLEM TO BE SOLVED: To attain downsizing of a receiving apparatus by providing a tuner part and a demodulation part to substrate surfaces different from each other, and to prevent the tuner part from being affected by the current of a higher harmonic wave signal caused in the demodulation part. SOLUTION: A tuner part 10 is provided on one side of a multilayered substrate 30, and a demodulation part 20 is provided on the other side. Furthermore, the multilayered substrate 30 comprises: an analog GND layer 33 connected to the tuner part 10; a digital GND layer 35 connected to the demodulation part 20; and a shield GND layer 34 provided between the analog GND layer 33 and the digital GND layer 35 for electrically shielding both the GND layers. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A compensating advanced feature patch panel (12) that can include removable modular (50) or fixed electronic components (46) located directly on the patch panel which are separately or in combination capable of providing advanced features such as device detection and power insertion. The patch panel provides communications between an insulation displacement connector (IDC) at a PD/User end (84), and any standard interface type using unshielded twisted pair cables, such as an RJ45 connector at a switch end (86) at performance levels of at least category 3, 5, 5e, 6 and/or higher (e.g. 6e or 7) and equivalent performance levels by compensating for the active electronics used in providing advanced features. Compensation is achieved in part through the separation and isolation of active and communication circuit elements.
Abstract:
A compensating advanced feature patch panel (12) that can include removable modular (50) or fixed electronic components (46) located directly on the patch panel which are separately or in combination capable of providing advanced features such as device detection and power insertion. The patch panel provides communications between an insulation displacement connector (IDC) at a PD/User end (84), and any standard interface type using unshielded twisted pair cables, such as an RJ45 connector at a switch end (86) at performance levels of at least category 3, 5, 5e, 6 and/or higher (e.g. 6e or 7) and equivalent performance levels by compensating for the active electronics used in providing advanced features. Compensation is achieved in part through the separation and isolation of active and communication circuit elements.
Abstract:
A printed circuit module (50) supports host processors and memories. The module permits easy upgrades and repairs of the semiconductor devices without requiring modification of the motherboard. The module (50) includes a multilayer printed circuit board with a symmetrical design, permitting integrated circuits to be placed on both sides of the board. Microvias (170) connect the contact points on a signal layer (88, 124) directly to a ground layer (92, 120) on the printed circuit board, thereby reducing the need for escape routing. This greatly simplifies the design layout of the module (50). The ground layer (92) is located between two signal layers (88, 96), thereby decreasing the crosstalk between the signal layers. The symmetrical design permits drilled vias (160) to extend from a quadrant of one integrated circuit and exit through a similar quadrant on the opposite side of the circuit board. The modular design also simplifies impedance matching. Testing of the module (50) may also be accomplished even when the module is not fully populated through the use of test bypass circuitry.
Abstract:
The initial intention in the semi-finished product of the invention is to provide a functional separation between the requirement for mechanical strength and the previously concomitant requirement, for completing a circuit, in order to bring the pure circuit connection, especially for signals, "closer" to the electrical and technical properties of chips. To do this, the layout miniaturisation is optimised without regard for the mechanical strength of the substrate. Instead of a printed circuit board (MCM), a semi-finished product which can be developed into a printed circuit board is made. The semi-finished product of the invention consists of an extremely thin film (8) with a plurality of extremely small holes (14) made simultaneously by an etching process. The hole diameters can be reduced by almost an order of magnitude (down to 20 mu m), facilitating, for instance, definite sub-100 mu m technology. Such a semi-finished product (19) does not act as a mechanical support but is designed only for signal conduction. The semi-finished product (19) which carries the densely packed wiring pattern, is bonded to a not densely packed power supply plane (22) acting as the service plane and the printed circuit board thus made is finally secured to a mechanical support (20).