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This paper introduces a codesign of electrostatic discharge (ESD) protection device and common mode suppression circuit on printed circuit board (PCB) for high-speed input/output interfaces. The characteristic and model of ESD protection device are investigated and applied into the design of common mode suppression circuit. The proposed design of two-layered PCB structure performs −10 dB common mode...
The signal interference technique is firstly employed to design the common-mode filter (CMF) for differential digital circuit applications. Using the network analysis, design curves for three common-mode transmission zeros are available by simple steps. A test sample is realized in two-layer PCB. The fractional bandwidth of common-mode suppression band (|Scc21| < −10 dB) is 63 %, from 3.85 GHz...
A novel wide stopband and compact bandstop filter (BSF) is proposed and realized based on defected ground structure (DGS) and meandered signal line on SiP. An equivalent circuit model is built to characterize the filter behaviors. At the same time, a condition for transmission zeros is derived. It can be observed that the equivalent circuit model reasonably agrees with the full-wave simulation and...
A miniaturized common-mode suppression filter for GHz differential signals is realized using LTCC fabrication technology. The filter is realized in SMD-typed package with the physical size of 1.6 mm × 1.6 mm. Its equivalent circuit model is established to illustrate the properties of the common mode suppression and the differential mode propagation. It is found in measurement that the common-mode...
A broadband common-mode noise suppression filter for GHz differential signals is proposed using effective negative permittivity transmission line metamaterial. The proposed structure possesses a complete ground plane for the use of the multilayer structure. The equivalent circuit models for odd mode and even mode are developed to derive the dispersion relation and understand the characteristic of...
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