文章目录
app开发定制在数字后端设计中使用shielding的目的主要是保护敏感net，减小其受到noise的影响。常用的shielding net是VDD和GND net。
查看Innovus UG > Design Implementation Capabilities > Using the NanoRoute Router
Performing Shielded Routing
The NanoRoute router can protect noise-sensitive nets, such as clock nets, from crosstalk by shielding them with power or ground wires. NanoRoute automatically generates a shielding and statistics report after routing. For information on the report, see the “Interpreting the Shielding Report” section.
The Figure below shows a section of a design with a shielded net. In the figure, you can see the following:
- The signal net is shielded by a power net on one side and a ground net on the other side. （两条shielding net分别是VDD和GND）
- Multiple vias can be dropped where a stripe crosses the shielding net at a right angle, if the stripe is wide enough to accommodate them.
- A segment of the signal net is not shielded. （shielded net的一部分是没有被覆盖到的）
- There are some floating shielding net segments. （存在一些没有connection的shielding net segment）