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Design of 𝝅-T-Diode based High-Speed CMOS ESD I/O Protection Circuit

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Abstract 6
1. Introduction 8

2. Analysis of Conventional ESD I/O Protection Circuits 11
2.1 All-pass T-Diode ESD I/O Protection Circuit 11
2.2 𝜋-Diode ESD I/O Protection Circuit 16
2.3 Bessel filter based ESD I/O Protection Circuit 21

3. Design of 𝝅-T-Diode with Power-Clamp ESD I/O Protection Circuit 28
3.1 Concept of the Proposed 𝜋-T-Diode Topology 28
3.2 𝜋-diode (𝐶𝐸𝑆𝐷/2) Design Parameter Selection 30
3.3 T-diode (𝐶𝐸𝑆𝐷/2) Design Parameter Selection 33
3.4 Comparison of 𝜋-T-Diode and Conventional ESD I/O Protection Topology 35
3.5 Circuit Design and Implementation 41

4. Measurement Results 49
4.1 S-parameters and Group delay 49
4.2 Eye diagram and BER Performance 52
4.3 ESD Robustness Performance 56

5. Conclusion 57

Reference 60

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