====== Configuration file ======
So far we have learned how to describe a circuit in ACT, simulate using prsim and irsim. Now, we will move on to the next stage i.e. designing CMOS circuits from ACT description. The process of designing circuit often starts with creating a spice netlist to simulate transistor-level circuit behavior. In order to generate a spice netlist, ACT requires some technology-dependent information and information to understand designer’s intent. We use configuration files to provide such information. For more information on configuration files, see [[config:start|ACT configuration files]]

The configuration files are saved in ''$ACT_HOME/conf/<technology>/'' directory. The default technology is called ''generic'', and the default configuration options are in ''global.conf''. It is possible to save technology specific configuration for each tool in a separate configuration file. For example, ''prs2net.conf'' for configuration related to netlist generator and ''layout.conf'' for layout parameters.