Signal Integrity for Differential Signaling in Gigahertz Systems
Date Issued
2003-07-31
Date
2003-07-31
Author(s)
DOI
912213E002109
Abstract
In the first year, the project emphasize at two parts: one is to investigate the
characteristic impedance of differential signaling and the ground bounce induced by
crossing the narrow slotline and the other is to find the effect of the bent differential
transmission lines. In part one, we change the several dimensions of differential
signaling to find the influence on characteristic impedance. Also, based on two
dimensional FDTD method, we tailor a simulation program inclusive of a model for
differential transmission lines and the ground bounce effects induced by crossing the
narrow slotline. Simulation results show that using the differential signaling can
greatly reduce the ground bounce. In part two, we present a de-embedding
procedure for strongly coupled differential line, which is not available from the
present commercial EM field solvers. Although this procedure is general for multiple
coupled transmission lines ports, it is applied to extract the 4 port ABCD matrix of the
differential bends. After the 4-port ABCD matrix is obtained, the lumped element
equivalent circuit model is extracted by generalizing the 2-port ABCD model
extraction method. Combining the coupled transmission line sections with the circuit
model for bends, the signal integrity effects of differential bends on pulse propagation
in high-speed digital circuits can be investigated and demonstrated.
Subjects
差模對傳輸線
彈地雜訊
去內箝
共模雜訊
訊號完整度
Differential signaling
de-embedding
Common noise
Signal integrity
Publisher
臺北市：國立臺灣大學電信工程學研究所
Type
report
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