Measurement analysis and improvement technique of signal integrity for high-speed connectors

Abstract

The demanding for high speed network communications explodes in recent years for Internet applications. Although the optical fibre deployed already provides broader bandwidth for high speed applications, the transceivers are still in need to convert optical signal into electrical signal for front-end of server computer. Therefore, the high speed connectors play critical roles for interconnect between optic-electric converting transceivers and server computer. In this study, we investigate the signal integrity (SI) analysis for 10 Gbps two-layered SFP+ connector with EM simulation and measurement. Since the differential pair transmission is applied to SFP+ connector, we measure its differential mode (DM) reflection and transmission coefficients with network analyser first. We then observe the variation of DM impedance and analyse the cause of impedance discontinuity by the utilization of TDR measurement. Finally, we will propose modified connecter structure by changing pin width to improve the signal integrity.

Optimal design of an electrical connector intermittent fault–accelerated reproduction test based on a genetic algorithm

“…5 To ensure the reliability of an electromechanical system, it is necessary to detect and diagnose the electrical connector intermittent fault caused by ambient stress. 6…”

“…5 To ensure the reliability of an electromechanical system, it is necessary to detect and diagnose the electrical connector intermittent fault caused by ambient stress. 6 The reproduction of intermittent faults is the premise of intermittent fault detection and diagnosis. As intermittent faults are closely related to real-time ambient factors, ambient stress is usually applied to the specimen for intermittent fault reproduction in the laboratory.…”

Research on intermittent failure re-presentation of electrical connector based on accelerated test

“…With the increase in the informationization and integration degree of the equipment system, the detection and isolation of intermittent failure becomes more and more difficult. [1][2][3] As a basic mechanical and electrical component, electrical connectors are widely used to transmit or convert the electrical signal by mechanical connection between electronic and electrical equipment. Always, there are many kinds of electrical connectors in a system.…”

10.3125Gbps High-Speed SFP+ Channel Signal Integrity Evaluations

“…For crosstalk in SFP+ cable, a rigorous statistical estimation method is developed to calculate the RMS NEXT value based on the NEXT-related pulse response [5]. For converting optical signal into electrical signal to feed in frontend of server computer for further processing, high-speed connectors now become the most critical issue for signal integrity requirement of high-speed data transmission due to hungry demanding for data rate and bandwidth [6]. In order to validate the 10Gbps channel modeling SI simulation flow, one evaluation board is used in this paper.…”