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Method for high-frequency modeling of a socket using high-order polynomials

IP.com Disclosure Number: IPCOM000008563D
Publication Date: 2002-Jun-24
Document File: 3 page(s) / 98K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for high-frequency modeling of a socket using high-order polynomials. Benefits include high-order socket simulation model applied for high-speed buses, with bit rate of 2.5 to 10 GT/S.

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Method for high-frequency modeling of a socket using high-order polynomials

Disclosed is a method for high-frequency modeling of a socket using high-order polynomials. Benefits include high-order socket simulation model applied for high-speed buses, with bit rate of 2.5 to 10 GT/S..

Background

              High frequency socket modeling is one of the advanced topics in high-speed signal integrity arena. Conventionally, no accurate method exists for high-frequency socket modeling.

              Typically, a socket is modeled using a quasi-static 3-D field solver extracting the lumped parasitic parameters and performing a lumped simulation model of a socket. The lumped model is not an accurate representation of the socket model for the high-frequency range above 2.5 GHz. However, the lumped simulation model is accurate up to 2.5 GHz.

              For example, the lumped electrical parasitic parameters of the three-wires socket are extracted using 3-D static field solvers for a given geometry of a socket by defining the signal and ground pattern (see Figure 1). An accurate and efficient method is required to extract a high-order simulation model representation of the socket using high-order polynomials. A high-frequency socket method did not develop, and the conventional socket model is the lumped socket simulation model with the lumped parasitic values extracted by 3-D static field solvers. The accurate and efficient method is developed using high-order polynomial for representing the high frequency socket model that is matched up to 8-10 GHz, comparing the results with the HFSS full wave field solvers.

              A substantial amount of faulty time and noise margins skew may develop in the bus system design with socket model using the lumped socket simulation model. However, the high-order socket simulation model for the bus design  at high bit-rate signaling can accurately predict the true time and noise m...