A layout engineer who studies signal integrity simulation
In the previous article, I introduced the netlist to Allegro. After the netlist is successfully imported, the first step in Allegro is to put in the successfully imported device. The following is a brief introduction to the specific operation process:
Step 1: Add version outline
Before we put in the components, we need an outline to facilitate the placement of the components. If we have the outline of the drawings given by the structure, we can follow their outline, but we must pay attention to the outline frame of the PCB in the Outline in the Board Geometry. If there is no DXF, we need to add one manually, as shown in the following figure:
Step 2: Automatically insert components
Select the Place command under the Allegro menu, click Quickplace, and the following dialogue box will pop up:
You can see in the above figure that there are 287 devices that have not been placed. After clicking Place, you will see that the devices are placed in sequence along the board shape. As shown in the figure below:
If there is a problem with our individual package, it will not be put in, and the number of Unplace will be displayed below. You can find out what problems are in the device package or schematic diagram, and then re-place it.
In the Place interface, there are many setting options, including placing the device according to the attribute, placing the device in TOP or BOTTOM, you can choose according to your own requirements, generally keep the default, as shown in the following figure:
Step 3: Manually insert components
Refer to the updated component package in the previous article: linkPrevious
article: Cadence Allegro PCB Design 88 Question Analysis (21) The link to update the device package (Footprint) in Allegro is as follows, you can click to view it: link: link
The above information is mainly compiled by myself in PCB design and Internet search. If
there is any similarity or error, I hope you will leave a message to correct me, thank you! ! !