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In this work, the polyharmonic distortion (PHD) model is used to analyze the behavior of high-speed nonlinear links. The model assumes the validity of the harmonic superposition principle for high-speed I/O links. From the PHD formalism, a frequency-domain X-parameter matrix formulation is derived. The formulation accommodates both port and harmonic dependence of the signals. Relationships are derived...
We describe the inclusion of parametric behavioral macromodels within the Transmission-Line Modelling (TLM) method. The macromodels reproduce the input/output port nonlinear behavior of digital integrated circuit (IC). They are integrated in the 3D electromagnetic full-field code Minisolve either through a current source or conductance of the medium. The numerical results are compared to experimental...
As data rate pushes to 10Gbps and beyond, timing jitter has become one of the major factors that limit the link performance. Thorough understanding of the link jitter characteristics and accurate modeling of their impact on link performance is a must even at early design stage. This paper discusses the characteristics of timing jitter in typical I/O interfaces and overviews various jitter modeling...
An efficient approach based on adjoint sensitivity is presented for time-domain sensitivity analysis of linear and networks containing lossy transmission lines. The sensitivity of an output with respect to all parameters of interest can be calculated by simulating the original and adjoint circuits simultaneously. The proposed approach provides a significant decrease in the computational expense for...
This paper deals with noise distribution over nonuniform two-dimensional planes of multi-core CPU packages. The numerical algorithm is based on circuit finite difference time domain, which employs voltage-controlled current sources in the current/voltage updating scheme. It is applied to plane pairs with non-uniform geometry (which can include metal voids), as well as arbitrary location of sources...
The thin, high-contrast, fine layers with dielectric and conductive properties, such as ground planes, are feature structures in IC packagings. Their responses to the pulsed electromagnetic field is important both theoretically and practically. In this paper, a new semi-analytical method is proposed to model the interaction of the layer with an incident electromagnetic field via a boundary condition...
The utilization of guard traces with two ground vias at both ends to improve the eye opening and jitter for serpentine delay lines has been investigated. However, it is not easy to accomplish using normal manufacturing technology nowadays because the position of the pad of grounded via is surrounded by serpentine trace. This is especially true in normal manufacturing technology, in which size of the...
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