Chih-Yu Chang

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This paper proposes a 3-GHz built-in jitter measurement (BIJM) circuit to measure clock jitter on high-speed transceivers and system-on-chip (SoC) systems. The proposed BIJM circuit adopts a high timing resolution and self-calibration techniques. To eliminate process variation effects in 3 GHz systems, this study proposes an auto-calibration technique for(More)
This paper proposes a 3 GHz built-in jitter measurement (BIJM) circuit to measure clock jitter on high-speed transceivers and SoC systems. The proposed BIJM circuit adopts a high timing resolution and self-calibration techniques and discusses the measurement error issues. The measurement error source is analyzed each block in BIJM. To eliminate process(More)
Distributed denial-of-service (DDoS) attacks can be regarded as the most serious threats for current Internet. This paper presents a two-tier coordination approach for detecting and mitigating DDoS attacks. The first tier traffic filter (1st-TF) filters suspicious traffic for possible flooding. This is achieved by using proactive tests to identify and(More)
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