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As technology advances, the demand for slim size and higher performance consumer electronics also increases drastically. Stripline is one of the layout designs that is becoming more and more popular on account of the fact that its homogenous characteristics could effectively decrease the interference from both the environmental and material factors. However, far-end crosstalk (FEXT) still exists due...
Electromagnetic interference (EMI) issue is usually caused by mutual coupled signal or coupling between signal trace and power/ground shapes which consequently creates radiations in the air. The way to solve this problem is to increase the distance between them. By comparing their S-parameter and current density, a real EMI issue is being discussed and two solutions are studied in this paper. First,...
The power switching noise caused by rapid charging and discharging has always been an issue in PDN (Power Delivery Network) design. This noise would not only deteriorate the stability of the power profile, it would also couple to signal transition via if the power via is placed nearby, resulting in deterioration of the overall system signal integrity. Therefore, the relative placement between power...
Frequency offset behavior of artificial magnetic structure (AMC) with finite size in real applications is investigated in this paper. A simplified model of wireless mobile device is adopted to observe this behavior. Two important features of AMC with finite size, number of unit-cells and total size of AMC structure, are analyzed to find main root cause of frequency offset behavior. A design suggestion...
In order to cultivate the comprehensive skills of students to develop a robot system, this paper proposed a low cost and simple robot system. The students designed and implemented a quadruped robot insect_ named robot-K. The electrical parts of robot-K contain servo motors, a DC-brushless motor, one microcontroller, a wireless communication module, an electronic speed control device and one battery...
In this paper, the switching flow-graph models are developed to study the nonlinear behavior of DC-DC switching converters. Based on the concept of virtual switches and virtual switching functions, switching flow-graph (SFG) model are created easily without complex mathematics. The SFG modeling technique is helpful for undergraduate students or beginners to understand how the switching converters...
Designed electromagnetic bandgap (EBG) structures are presented for noise suppression in an 8 mm × 8 mm System-in Package (SiP) module. By embeddeding a spiral inductor, the lower suppression frequency can decrease to 2.3 GHz on a 3 × 3 lattice EBG structure. For practical layout consideration, an improved EBG structure with meandering short stubs is proposed to provide a 26.4% fractional bandwidth.
A closed-form expression of the unintentional electromagnetic radiation of parallel microstrip traces is proposed. Based on transmission line theory, far-field Green's function, and concept of array factor in antenna theory, analytical solutions for the electric field radiated from a pair of parallel microstrip lines are developed. Depending on the printed circuit board material, dimension parameters,...
This paper proposes a new filtering scheme _ PI remover for effectively eliminating the salt-and-pepper noise of images. The PI-remover can be created straightforwardly based on the concept of proportional-integral (PI) controller. Similar as the design of PI-controller, the PI-remover also has the proportional parameter kP and integral parameter kI, that are used to weight the noisy pixels. The modified...
In demand of high-speed differential data communication, the common mode filter is usually presented. The new common mode filter demonstrated in this paper is designed by edge-coupled differential pairs. By using double loops routing structure, the coupling inductance is increased. To achieve sufficient common mode noise suppression while introducing minimal signal insertion loss, the full-wave time...
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