When you need to know the path of the project you are running the ULP within the following code snippet is useful. string get_project_path() { if (board) board(B) return(filedir(B.name)); if (schematic) schematic(B) return(filedir(S.name)); if (library) library(B) return(filedir(L.name)); } string Directory; Directory Read more…
You select a device in an opened library for edit by using this syntax: edit deviceset Value is set to an active editable value with the syntax: value on Thus on a meta level this script is going to do the following things for each part in the library: write the open device Read more…
If you plot a curve of constant ratio of Impedance / Resistance you will see that they plot out football shaped areas on the Smith Chart. See below: If you are attempting to design the widest band match possible then do not violate the initial footbal in which your load Read more…
If your 50 ohm microstrip transmission line varies somewhat in impedance when you are connecting 2 50 Ohm elements together you can use a 1/2 wave length of line in between the blocks if space is available and the design is narrow band. What will happen in a full spin around Read more…
WinSmith is a Smith chart match calculating program. The starting point is 8 – j16 ohms @ 915MHz. Both the blue and the green curves start at this point at the lower left of the curves. Click on the image to see a bigger version What is interesting about the Read more…
Research Links Microwaves101: Filling Factor The question arose given a fixed microstrip transmission line characteristic impedance how does the percentage of the field in the substrate change? This is called the filling factor: Keff=ER*FF+1x(1-FF) It is the fraction of the field in the substrate. I calculated the following values: FF=(Keff-1)/(ER-1) Dk=4 Read more…
Research Links http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=IMX53QSB# – 149 USD with touch screen Google Search:Freescale IMX53 ARM motherboard IMX53 ARM motherboard on Alibaba ARM Chromebook Using Hard Drive with imx53 QSB – see detailed explanation by Dejan QSB Hardware Guide The i.MX53 Quick Start Board is a $149 open source development platform. Integrated with Read more…
For my BOM ULP I want to use attribute fields that you can see here. To do this I need to know how to read an attribute. The code snippet below does that. The test attribute name is FUDGE and the test value is VANILLA. To read attributes you Read more…
Now it is time to build on the previous examples. This example does the following: Get the path of the User Language Program (ULP) It loops through all the parts As it loops it appends the part name to a file dlgMessageBox("Do you want to count the parts?","Yes","No","Maybe"); Read more…
If you want to alter anything on the schematic with a User Language Program you will need to output to a command line script file. The most common thing to do is write it to the same directory that the ULP is in. To do that you are going Read more…