Abstract:
The present invention relates to a circuit board in which signal lines transmitting a signal are wired, and which is capable of increasing the speed of signal transmission. There is provided a circuit board in which signal lines are wired, including: a signal pad which is formed at the tip of the signal line and has a signal via in the center thereof; and plural ground vias which are formed in positions to surround the signal pad and transmit a ground potential over plural wiring layers.
Abstract:
One embodiment of the present invention provides a device for providing a low noise power supply package to an IC in the mid-frequency range of 1 MHz to 3 GHz comprising installing in said package an array of embedded discrete ceramic capacitors, and optionally planar capacitor layers. A further embodiment provides a device for providing a low noise power supply package to an IC in the mid-frequency range of 1 MHz to 3 GHz comprising using an array of embedded discrete ceramic capacitors with different resonance frequencies, arranged in such a way that the capacitor array's impedance vs frequency curve in the critical mid-frequency range yields impedance values at or below a targeted impedance value.
Abstract:
The present invention discloses capacitors having via connections and electrodes designed such that they provide a low inductance path, thus reducing needed capacitance, while enabling the use of embedded capacitors for power delivery and other uses. One embodiment of the present invention discloses a capacitor comprising the following: a top capacitor electrode and a bottom capacitor electrode, wherein the top electrode is smaller than the bottom electrode, comprising, on all sides of the capacitor; in an array, a multiplicity of vias located on all sides of the top and bottom capacitor electrodes, wherein the top electrode and the vias connecting to the top electrode act as an inner conductor, and the bottom electrode and the vias connecting to the bottom electrode act as an outer conductor.
Abstract:
A trace cover suitable for shielding a conductive trace on a top layer of a circuit board. The trace cover includes a dielectric body disposed substantially over the conductive trace, side shielding perpendicular to the direction of the conductive trace and substantially parallel to the length of the conductive trace, and top shielding disposed on the top surface of the body. The side shielding and top shielding are electrically coupled with the at least one circuit ground of the circuit board.
Abstract:
A plurality of signal lines are provided on one main surface of a dielectric substrate. A plurality of other signal lines are provided on the other main surface of dielectric substrate. The plurality of signal lines on one main surface and the plurality of other signal lines on the other main surface are provided so as to extend in parallel to one another. A ground pattern having its potential fixed is provided between neighboring signal lines on one main surface, and a ground pattern having its potential fixed is provided between neighboring signal lines on the other surface. According to such a structure, a microstrip line that can include a larger number of signal lines on the main surfaces of the dielectric substrate, without increasing a size of the dielectric substrate is obtained.
Abstract:
An electro-magnetically shielded slot-transmission line is formed by metallizing the opposing sides of a slot cut through a dielectric substrate. A ground plane is deposited on the bottom of the substrate. Conductive vias through the substrate and that contact the ground plane are located on both sides of the metallized slot surfaces. Conductive pads on the upper surface and which contact the vias provide additional shielding.
Abstract:
A pseudo-coaxial vertical transition (10) includes a substrate (16). A bump array is disposed in a substantially concentric bump pattern upon the substrate (16) for simulating a pseudo-coaxial vertical electromagnetic wave propagation. The bump array is formed from a centrally disposed bump (32) having a predetermined bump diameter, and a plurality of at least five ground bumps (36) substantially equi-distant and circularly disposed about the centrally disposed bump (32). The predetermined bump diameter and a bump spacing of the centrally disposed bump are determined in relation to the plurality of ground bumps and a dielectric constant of air for providing a characteristic impedance.
Abstract:
ABSTRACTA transceiver (20) for a millimeter wave signal, consisting of a PCB (140) having PCB microstrip lines (141) and PCB waveguide apertures (159), and one or more transmitter modules (22) and one or more receiver modules (24, 26, 28) mounted on the PCB. Each module has a single microstrip-waveguide transition (34, 48) and a microstrip-microstrip transition (47, 49). The microstrip-waveguide transition of each module couples to one of the PCB waveguide apertures via a PCB-module waveguide-waveguide transition (167). The microstrip-microstrip transition of each module couples to one of the PCB microstrip lines via a PCB-module microstrip-microstrip transition (165). The PCB-module transitions are low tolerance, facilitating implementation of the transceiver.
Abstract:
Stacked receptacles in a connector that each provide side-by-side differential signal contacts, are attached to a circuit board without additional width to accommodate multiple layers of differential signals by using connector wafer inserts that rotate the side-by-side positioned differential signal contacts to front-to-back contacts.
Abstract:
In a flat flex cable, signal lines are surrounded by logic ground planes above and below which are viaed together left and right. The ground planes coupled with the flex cable dielectric determine characteristic the impedance and attenuation of the cable and provide differential signal EMI shielding. All signal layers and logic ground planes are enclosed within the two outermost shield layers which are viaed together left and right and around the connectors to enclose both signal layers and logic ground planes to provide common mode EMI shielding.