中圖分類號： TN402 文獻標識碼： A DOI：10.16157/j.issn.0258-7998.211960 中文引用格式： 劉濤，宗艷艷，王乾輝，等. 基于PCIe Gen5的低成本Coupon設計[J].電子技術應用，2022，48(6)：116-120. 英文引用格式： Liu Tao，Zong Yanyan，Wang Qianhui，et al. Low-cost Coupon design based on PCIe Gen5 signal[J]. Application of Electronic Technique，2022，48(6)：116-120.
Low-cost Coupon design based on PCIe Gen5 signal
Liu Tao，Zong Yanyan，Wang Qianhui，Qin Yuqian，Tian Minzheng，Yu Huaguo
Inspur Electronic Information Industry Co.，Ltd.，Jinan 250101，China
Abstract： The development of digital technology is changing rapidly. In the new generation of server products, the PCIe Gen5 signal rate has reached 32 Gb/s. In order to ensure its signal integrity design, single-board loss monitoring is essential, and a good Coupon design is therefore particularly important. Traditional Coupons mostly use Litek probe technology, and wiring in a broken line. Although the technology is mature, there are still many problems such as large space occupation and poor data stability. Based on the low-cost requirements of product design, this paper researches on the low-cost Coupon design of PCIe Gen5 signal. Different wiring methods are analyzed and compared through theoretical analysis and simulation. Then the high-reliability Coupon wiring method is selected which can also takes up less space. The test fixture is also optimized which can also improve data stability. Experimental results show that the Coupon design method proposed in this paper not only takes up less space than traditional methods, but also has higher data stability. Therefore, this method is more conducive to the low-cost and high-reliability design of Coupons.
Key words : PCIe；32 Gb/s；Coupon；phase difference；test verification