Let's continue to learn about 4 situations and methods to reduce the tight delay deviation.
1. When implementing serpentine routing, it should be placed at the root of the length mismatch to more effectively compensate for length differences, as shown in the cover figure.
2. Bends are a common source of length mismatches, so compensators (i.e., serpentine routing) should be placed as close as possible to the bends, with a maximum distance recommendation of no more than 15mm, to minimize clock skew caused by bends, as shown in the figure below:
3. In some cases, two bends can compensate for each other, and if the distance between bends is less than 15mm, additional serpentine compensation may not be necessary. Additionally, the asynchronous transmission distance of signals should be controlled within 5mm to ensure signal synchronization, as shown in the figure below:
4. Mismatches at each stage of differential pair connections should be matched individually. For example, vias can divide a differential pair into two segments, and at this point, each segment's bends need to be compensated for separately. Doing so ensures that positive and negative signals propagate synchronously through the vias, as shown in the figure below:
In the next article, we will introduce the remaining four routing design methods.
