Abstract:
A DC bus for use in a power module has a positive DC conductor bus plate parallel with a negative DC conductor bus plate. One or more positive leads are connected to the positive bus and are connectable to a positive terminal of a power source. One or more negative leads are connected to the negative bus and are connectable to a negative terminal of a power source. The DC bus has one or more positive connections fastenable from the positive bus to the high side of a power module. The DC bus also has one or more negative connections fastenable from the negative bus to the low side of the power module. The positive bus and negative bus permit counter-flow of currents, thereby canceling magnetic fields and their associated inductances, and the positive and negative bus are connectable to the center portion of a power module.
Abstract:
A DC bus for use in a power module includes a positive DC conductor bus plate parallel with a negative DC conductor bus plate. The positive bus and negative bus permit counter-flow of currents, thereby canceling magnetic fields and their associated inductances, and the positive and negative bus are connectable to the center portion of a power module.
Abstract:
A printed circuit board is disclosed. A top layer power supply pattern and a top layer ground pattern are formed. The top layer power supply pattern and the top layer ground pattern are connected to a power supply layer and a ground layer through a plurality of viaholes, respectively. A plurality of capacitors or a plurality of capacitor resistor series circuits are disposed at predetermined intervals between the top layer power supply pattern and the top layer ground pattern.
Abstract:
First to fourth power wiring conductors and first to fourth ground wiring conductors are arranged on first to fourth insulating layers, respectively, and a first signal wiring conductor is arranged on the first or second insulating layer and a second signal wiring conductor is arranged on the third or fourth insulating layer. In a multilayer circuit board of the invention, the first to fourth insulating layers are sequentially overlaid in the following manner: each of wiring conductors on the same insulating layer is arranged substantially in parallel to each other, each set of the first power wiring conductor and the second ground wiring conductor, the first ground wiring conductor and the second power wiring conductor, the third power wiring conductor and the fourth ground wiring conductor, and the third ground wiring conductor and the fourth power wiring conductor is arranged so that two wiring conductors are opposed to each other nearly in parallel while interposing the insulating layer therebetween, and each wiring on the first and second insulating layers and each wiring on the third and fourth insulating layers intersect at a right angle, and wherein the first to fourth power wiring conductors and the first to fourth ground wiring conductors are connected via thorough conductors disposed through the insulating layers. The inventive multilayer circuit board ensures a uniform characteristic impedance on the signal wiring conductor to enable a stable power supply to a semiconductor device.
Abstract:
A signal processing board includes a six-layer substrate. A plurality of signal transmission planes are formed in a first layer, a third layer, a fourth layer, and a sixth layer. A first ground plane is formed in a second layer. A first power supply plane is formed in a fifth layer and electrically connected to the first semiconductor element. A second power supply plane is formed in the fifth layer and electrically connected to the second semiconductor element. A second ground plane is formed in the fifth layer. A first bypass capacitor is electrically connected to the first power supply plane and the second ground plane. A second bypass capacitor is electrically connected to the second power supply plane and the second ground plane.
Abstract:
A semiconductor device of the present invention includes: a substrate (12) that is annular or partially annular; a first phase control circuit (14) provided on the substrate (12), the first phase control circuit being configured to control a first phase of a plurality of phases of a motor; a second phase control circuit (15) provided on the substrate (12) so as to be adjacent to the first phase control circuit (14) in a circumferential direction of the substrate (12), the second phase control circuit (15) being configured to control a second phase of the plurality of phases of the motor, the second phase being different from the first phase; a power supply wiring (18) disposed on one of an outer circumferential side and an inner circumferential side of the first phase control circuit (14) and the second phase control circuit (15) in a radial direction of the substrate (12), the power supply wiring (18) being connected to the first phase control circuit (14) and the second phase control circuit (15), and the power supply wiring (18) extending in the circumferential direction of the substrate (12); and a ground winding (19) disposed on an other one of the outer circumferential side and the inner circumferential side of the first phase control circuit (14) and the second phase control circuit (15) in the radial direction of the substrate (12), the ground winding (19) being connected to the first phase control circuit (14) and the second phase control circuit (15), and the ground winding (19) extending in the circumferential direction of the substrate (12).
Abstract:
Embedding a discrete electrical device in a printed circuit board (PCB) includes: providing a vertical via as a blind hole from a horizontal surface of the PCB to an electrically conductive structure in a first layer, the first layer being one layer of a first core section of a plurality of core sections vertically arranged above each other, each core section including lower and upper conductive layers, and a non-conductive layer in between; inserting the electrical device into the via, with the device extending within at least two of the core sections; establishing a first electrical connection between a first electrical device contact device and the electrically conductive structure in the first layer; and establishing a second electrical connection between a second electrical device contact and a second layer, the second layer being one of the electrically conductive layers of a second horizontal core section.
Abstract:
A capacitor with low equivalent series inductance includes multiple electrode layers arranged in parallel with alternating ones of the electrode layers connected together to form the two electrodes of the capacitor. A first set of the electrode layers are connected by an outer wall. A second set of the electrode layers are connected by a central post. Terminals on the capacitor can be spaced on a surface so that signals can be conveniently routed when the capacitor is mounted on or in a printed circuit board or integrated circuit package. Terminals can be included on opposing surfaces of the capacitors to provide for stacking. Additionally, one of the terminals substantially surrounds the other terminal and can provide electromagnetic shielding.
Abstract:
A multilayer wiring board includes a signal electrode, a first power supply electrode, and a ground electrode, which are connected to a first element that outputs a signal, an electrode connected to a second element that receives the signal, a ground layer that serves as a return path for a return current of the signal, a first power supply layer that is disposed adjacent to the ground layer with a dielectric layer interposed therebetween and supplies electric power to the first element, and a second power supply layer that is provided independently of the first power supply layer and supplies electric power to the second element. The first power supply layer causes the return current to return to the first element through the first power supply electrode as a displacement current between the ground layer and the first power supply layer.
Abstract:
An object of the present invention is to provide a capacitor-incorporated wiring substrate in which connection reliability can be improved through ensuring of a path for supply of electric potential even upon occurrence of a faulty connection in a via-conductor group. In a capacitor-incorporated wiring substrate of the present invention, a capacitor 50 is accommodated in a core 11, and a first and a second buildup layers 12 and 13 are formed on the upper and lower sides, respectively, of the capacitor 50.