Crosstalk Analysis of Delay-Insensitive Code in High-Speed Package Interconnects.

Area of Science:

• Electrical Engineering
• Computer Engineering
• Materials Science

Background:

• Integrated circuit development necessitates denser chip interconnects, posing design challenges.
• Close interconnect spacing increases space utilization but exacerbates crosstalk in high-speed circuits.

Purpose of the Study:

• To apply delay-insensitive coding to high-speed package interconnect design.
• To analyze the impact of delay-insensitive coding on crosstalk reduction in 26 GHz interconnects.

Main Methods:

• Implementation of delay-insensitive coding (1-of-2 and 1-of-4) for package interconnects.
• Analysis of crosstalk performance at various wiring spacings (1-7 μm) at 26 GHz.

Main Results:

• Delay-insensitive coding demonstrates high crosstalk immunity.
• 1-of-2 and 1-of-4 encoded circuits reduced crosstalk peaks by 22.9% and 17.5% on average, respectively.
• Achieved closer wiring spacing due to reduced crosstalk.

Conclusions:

• Delay-insensitive coding is an effective strategy for mitigating crosstalk in high-speed package interconnects.
• This approach enables improved space utilization and denser interconnect layouts.