Hon Hai Precision Industry Co., Ltd.

Yung-Chieh Chen

Shou-Kuo Hsu

Shen-Chun Li

Hsien-Chuan Liang

Shin-Ting Yen

Cheng-Hsien Lee

Chun-Jen Chen

Duen-Yi Ho

Wen-Laing Tseng

Dan-Chen Wu

Ying-Tso Lai

Cheng-Shien Li

Hsiao-Yun Su

Hung Chao

Po-Chuan Hsieh

Chia-Nan Pai

Wei-Chieh Chou

Jia-Chi Chen

A motherboard includes a printed circuit board (PCB), a central processing unit (CPU), a regulator, a first memory adaptor, and a second memory adaptor. The PCB includes a top surface, a bottom surface, a plurality of first soldering pads and first leads arranged on the top surface, and a plurality of second leads arranged between the top surface and the bottom surface. The PCB defines a plurality of first vias, second vias, and power vias. The CPU is connected to the first vias. The voltage regulator is connected to the power vias. The first memory adaptor neighbors to the regulator and is surface-mount soldered to the first soldering pads. The first soldering pads are connected to the first vias by first leads. The second memory adaptor is soldered to the second vias. The second vias are connected to the first vias by the second leads.

Motherboard capable of reducing electromagnetic interference

A system and method for checking a ground via of control chips of a printed circuit board (PCB) provides a graphical user interface (GUI) displaying a layout of the PCB. The control chip has a plurality of ground pins. The computer searches for signal path routing of each ground pin and ground vias along each signal path routing of each ground pin. If there are any ground vias having the same absolute coordinates, the computer determines that the ground vias are shared by more than one ground pin.

System and method for checking ground vias of a controller chip of a printed circuit board

Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, and thickness of each of dielectric layers can be changed. When any component needs to be replaced, the filter can be detached as needed.

Radio frequency filter

A serial advanced technology attachment (SATA) DIMM includes a board body. A control chip is arranged on the board body. An extending board extends from an end of the board body. A first edge connector is set on the extending board. A second edge connector is set on a bottom side of the board body. The first edge connector includes a number of signal pins connected to the control chip, and a number of ground pins.

Serial advanced technology attachment DIMM

A printed circuit board includes a first signal layer, a first reference layer, a second signal layer, and a third signal layer in that order and includes a first slanted via and a second slanted via. The first signal layer includes an parallel first transmission wire and a second transmission wire. The first and second transmission wires are coupled with each other and cooperatively constitute a first differential pair with an edge-coupled structure. The second signal layer includes a third transmission wire. The third signal layer includes a fourth transmission wire parallel to and coupled with the third transmission wire. The third and fourth transmission wires cooperatively constitute a second differential pair with a broadside-coupled structure. The first slanted via obliquely are interconnected between the first transmission wire and the third transmission wire. The second slanted via obliquely are interconnected between the second transmission wire and the fourth transmission wire.

Printed circuit board

A printed circuit board includes a base, a signal layer lying on the base, and a number of pairs of differential signal traces positioned on the signal layer. The base is made of a grid of glass fiber bundles filled with epoxy resin. Each pair of differential signal traces includes a first signal trace and a second signal trace. Each of the first and second signal traces extends in a zigzag pattern. The first signal trace includes a number of wave crests and wave troughs. The wave crests define a reference straight line that connects all the wave crest of the first signal trace. The ratio of the distance from each wave crest to the reference straight line to the orthogonal distance between each wave crest and an adjacent wave trough along the reference straight line is 1:5.

A system and method generates a test file of a print circuit board (PCB). The system and method loads trace information of the PCB into a storage system of a test computer, searches the storage system for the trace information matching keywords received and selects traces to test from the searched results. The system and method further acquires length and test points of each selected trace, and sets test parameters of each test item. In addition, the system and method generates a test file of the PCB according to the test parameters, the length, and the test points of each selected trace.

System and method for generating a test file of a printed circuit board

A printed circuit board includes a first to a fifth connector pads, a first to an eighth coupling capacitor pads, a first to a tenth transmission lines, a first via and a second via, a first to a fourth sharing pads, and a voltage converting circuit. The printed circuit board is operable to selectively support different types of connectors.

A reversing transmission includes a shaft, a retainer, a spacing collar, reversing members, two gears and two covers. The holder is sleeved on the shaft with spaced sliding notches formed thereon. The spacing collar is mounted on an outer surface of the retainer. The reversing members each include two spaced swing plates, with two reversed spiral teeth dented on two diagonal half surfaces of the two spaced swing plates. The reversing members slide into the sliding notches of the holder, with the two swing plates of each reversing member distributed at different sides of the spacing collar. Each of the gears has a group of spiral teeth formed on the inner side for engaging with the group of spiral teeth of the reversing members, and cogs formed on the outer circumference surface. The covers are mounted on two opposite ends of the holder to keep the reversing members in position.

Reversing transmission

A computing system includes a drawing unit and a layout unit. The computing system sets components parameters to components of a circuit diagram of a printed circuit board (PCB). The drawing unit draws the circuit diagram by using the components with the components parameters. If the drawing unit wants to use a component more than once, the computing system copies the component and the corresponding components parameters. The drawing unit uses the copied components and the corresponding parameters. If the circuit diagram has been drawn, the layout unit loads the circuit diagram and wires the PCB according to the components and the components parameters in the circuit diagram.

Printed circuit board layout system and method

A printed circuit board layout method includes the following steps. Providing a printed circuit board with a first layout layer and a second layout layer. Disposing a pair of first conducting portions on the first layout layer to electrically couple to a control chip. Sequentially disposing a pair of second conducting portions, a pair of third conducting portions, and a pair of fourth conducting portions on the second layout layer. Providing a pair of connecting portions to connect the first conducting portions and the third conducting portions. Electrically connecting an electronic device to the second conducting portions, and providing a first and second components are coupled with the third and fourth conducting portions, or electrically coupling the electronic device to the fourth conducting portions, and providing the first and the second components are coupled with the second and third conducting portions.

Printed circuit board layout method

Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions moving to two slots of an insulation portion, to detach the filter.

Radio frequency filter and filtering unit thereof

A printed circuit board includes first and second transmission lines connected to a first high speed differential signal control chip, third and fourth transmission lines connected to a second high speed differential signal control chip, and fifth and sixth transmission lines connected to a connector pad. To have the first high speed differential signal control chip communicate with the connector pad, the first transmission line is connected to the fifth transmission line through a first connection component, and the second transmission line is connected to the sixth transmission line through a second connection component. To have the second speed differential signal control chip communicate with the connector pad, the third transmission line is connected to the fifth transmission line through the first connection component, and the fourth transmission line is connected to the sixth transmission line through the second connection component.

A printed circuit board (PCB) includes two layers, two signal transmission traces, and a vertical interconnect access (via). The signal transmission traces are respectively arranged on the layers. The signal transmission traces are electrically connected to each other through the via. A centerline of the via with a vertical line of the layers form an acute angle &#x3b8;, the angle &#x3b8; is less than cos[(Lv&#x2212;Lt)/(Lv+Lt)]. Wherein Lt is loss of the two signal transmitting traces in a unit length, and Lv is loss of the via in a unit length.

Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, thickness of a dielectric layer, and thickness of an insulation tube can be changed. When any component needs to be replaced, each cover is rotated, with connection partitions move to two slots of an insulation portion, to detach the filter.

Growing community of inventors

Taipei Hsien, Taiwan

Yung-Chieh Chen