Files ac4 extension are used by SPICE. They contain domain output data.
Software that open ac4 file
AC4 file extension - SPICE AC/frequence domain output file
What is ac4 file? How to open ac4 files?
The ac4 file extension is associated with SPICE (Simulation Program with Integrated Circuit Emphasis) program, developed by National Instruments Corporation. The ac4 extension files are used for AC/frequence domain output.
The default software associated to open ac4 file:
Company or developer:
National Instruments Corporation
A computer simulation and modeling software, SPICE is used by engineers to mathematically predict the behavior of electronics circuits.
List of recommended software applications associated to the .ac4 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ac4 file, edit ac4 file, convert ac4 file, view ac4 file, play ac4 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with ac4 file - SPICE AC/frequence domain output file
Click on the software link for more information about Spice. Spice uses ac4 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).