摘要:
A computing device and a method selects a signal transmission line from a circuit board, computes an actual length of each line segment of the selected signal transmission line, and computes an actual distance between each line segment of the selected signal transmission line and a corresponding line segment of each neighboring signal transmission line. If each actual length is less than or equal to a corresponding reference length and each actual distance is more than or equal to a corresponding reference distance, the device and method determines a design of the selected signal transmission line satisfies the design standards. Otherwise, if any actual length is more than a corresponding reference length, or if any actual distance is less than a corresponding reference distance, the device and method determines the design of the signal transmission line does not satisfy the design standards.
摘要:
In a method for verifying a printed circuit board (PCB) layout using a computing device, a PCB simulation file is obtained from a storage device of the computing device, and a PCB image is displayed on a display device according to the PCB simulation file. The PCB image includes multiple signal lines and switching voltage regulator nodes (SVRN). A SVRN to be checked is selected from the PCB image, and all signal lines around the SVRN are searched. The method calculates a layout distance between the selected SVRN and each of the searched signal lines, and generates a graphical window interface to position a signal line whose layout distance is equal to or less than the minimum distance. The method further modifies the layout of the positioned signal line to satisfy a layout design specification by increasing the layout distance to the minimum distance.
摘要:
A computing device and a method involves selection of one or more transmission lines from a printed circuit board (PCB) layout file, reading a transmission line from the one or more selected transmission lines, and determining neighboring anti-pads of the read transmission line in the PCB layout file. The computing device and method further determine an actual distance between the read transmission line and a neighboring anti-pad. If the actual distance is less than a preset standard distance, the computing device and method determine that the read transmission line and the neighboring anti-pad do not satisfy design requirements, and highlight the read transmission line and the neighboring anti-pad, to prompt a user to amend design of the read transmission line and the neighboring anti-pad.
摘要:
A printed circuit board includes first and second layers, a control chip, bonding pads, and several electronic elements. The bonding pads can be selectively applied to interconnect the first and second layers, and the control chip with any of the electronic elements in a simple layout.
摘要:
A computer-based method and a computing device for checking stub lengths of via stubs of a printed circuit board (PCB) layout are provided. The computing device displays a check interface, selects signal transmission line from a currently run PCB layout through the check interface, receives a reference stub length input through the check interface, and determines the actual stub length of each via stub of each via each selected signal transmission line connected to. The computing device further determines that a design of one via stub satisfies the design standards, if the actual stub length of the one stub via is less than or equal to the reference length, and determines that a design of one via stub does not satisfy the design standards if the actual stub length of the one via stub is greater than the reference stub length.
摘要:
A printed circuit board includes an insulation layer and a signal layer attached to the insulation layer. The signal layer includes a pair of differential transmission lines. Width W of each of the differential transmission lines is changed according to change of space S between the differential transmission lines, based on the following formula: W = C 1 × H × ( C 2 × H 0.8 W 0 + T ) C 3 × ⅇ C 4 × S 0 H - 1 1 - C 3 × ⅇ C 4 × S H - 1.25 T In above formula, C1=7.475, C2=5.98, C3=0.48, C4=−0.96, H is a thickness of the insulation layer, W0 is an original width of each of the differential transmission lines, and S0 is an original space between the differential transmission lines, and T is a thickness of each of the differential transmission lines.
摘要翻译:印刷电路板包括绝缘层和附着到绝缘层的信号层。 信号层包括一对差动传输线。 差分传输线路的宽度W根据以下公式根据差分传输线路之间的空间S的变化而变化:W = C1×H×(Cé2×H 0.8W 0 + T)C uch 3×ⅇC ud 4×S 0 H-1 1 -C3×ⅇC ud 4×SH-1.25T在上式中,C1 = 7.475,C2 = 5.98,C3 = 0.48,C4 = -0.96,H是绝缘层的厚度,W0是差分传输线的原始宽度,S0是差动传输线之间的原始空间,T是各个差分传输线的厚度 差动传输线。
摘要:
A motherboard interconnection device includes a top layer, a bottom layer, a first and a third electronic elements positioned on the top layer, and a second and a fourth electronic elements positioned on the bottom layer. A first end of the first electronic element on the top layer is connected to the first end of the second electronic element on the bottom layer with a first via hole, and the first end of the third electronic element on the top layer is connected to the first end of the fourth electronic element on the bottom layer with a second via hole. The second ends of the two electronic elements on the top layer are connected to a first part, and the second ends of the two electronic elements on the bottom layer are connected to a second part.
摘要:
A printed circuit board includes a signal plane and a reference plane. The signal plane includes a pad, a passive element mounted on the pad, and a signal transmission line electrically connected to the passive element via the pad. The reference plane provides a return path for a signal transmitted through the passive element and the signal transmission line. A void is defined in the reference plane corresponding to the passive element, to increase a length of the return path. A length of a first axis, perpendicular to the signal transmission line, of the void satisfies a following equation: W 1 ≈ 8 Wpad + 10 T 0.8 Wtrace + T , wherein Wpad is a width of the pad, Wtrace is a width of the transmission line, T is the height of the pad.
摘要:
An exemplary PCB includes a first reference layer, a first signal layer, a second signal layer, and a third signal layer in that order, a first differential pair is arranged in the first signal layer in edge-coupled structure and references the first reference layer, a distance between the first signal layer and the second signal layer is greater than a distance between the first reference layer and the first signal layer, a second differential pair is arranged in the second signal layer and the third signal layer in broad-coupled structure. The PCB has a high density layout of transmission lines.
摘要:
A pad includes a first mating section and a second mating section. The first mating section includes a first horizontal plane and a first inclined plane. The second mating section includes a second horizontal plane and a second inclined plane. The first mating section is a copper foil capable of being connected to a wire. The second mating section is made of insulating material. The first inclined plane and the second inclined plane are bonded together.