Built-in Ring Transmission Line Structure for Signal Integrity Optimization of PAM4 Signaling in PCBs

Le, Hung Khac; Nguyen, Hoang; Han, Youngbong; Kim, Soyoung

doi:10.1109/temc.2021.3078438

Cited by 2 publications

(1 citation statement)

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“…A good high-speed circuit can make the system more stable and reliable, but also can improve the performance of the system. When processing the signal in high speed circuit, there are mainly the following aspects of signal integrity problems: transmission line problem, reflection problem, crosstalk problem, delay and timing problem [1]. In order to ensure the transmission quality of high-speed signals, coupling capacitor is added to the signal transmission line, which can filter, block and protect the chip [2].…”

Section: Introductionmentioning

confidence: 99%

Coupling capacitor design and optimization for high speed circuits

Zheng

Huang

et al. 2023

2022 Workshop on Electronics Communication Engineering

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This paper discusses how the coupling capacitor of transmission line in high speed circuit is optimized. Take the 400G bit error tester as an example, the characteristic impedance of the transmission line before and after adding the coupling capacitor is simulated. In order to reduce impact on signal integrity caused by impedance mismatch, the treatment method of voiding is obtained through the impedance calculation formula. By comparing several different voiding scheme proposed by predecessors, on the basis of the previous work, the hollowing treatment is further optimized to study the effect of hollowing size on signal integrity. Then HFSS software is used for modeling and simulation, and the insertion loss and return loss under several different schemes are calculated. It is found that the size of the hollowing process will have a certain impact on the integrity of the signal, and to a certain extent, the larger the hollowing size, the smaller the insertion loss and return loss.

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Section: Introductionmentioning

confidence: 99%