Convert CIR to SCH

Understanding CIR and SCH file formats

CIR files are typically associated with circuit design software, such as SPICE simulators. These files contain netlists or circuit descriptions used for electronic circuit simulation. SCH files, on the other hand, are schematic files used by electronic design automation (EDA) tools like KiCad or EAGLE. SCH files visually represent the circuit's schematic diagram, making them essential for PCB design and documentation.

Why convert CIR to SCH?

Converting a CIR file to a SCH file allows engineers to move from a netlist-based circuit description to a graphical schematic. This is useful for further editing, visualization, or preparing for PCB layout in EDA tools.

Best software for CIR to SCH conversion

There is no direct, universal converter for CIR to SCH, as the process often depends on the specific tools and formats involved. However, KiCad is a popular open-source EDA suite that can help with this conversion through intermediate steps:

• Use KiCad's eeschema to create or import netlists.
• Convert your CIR (SPICE netlist) to a format compatible with KiCad, such as a generic netlist or by using scripts.
• In KiCad, go to File → Import → Netlist to bring in the circuit structure.
• Manually adjust and annotate the schematic as needed.

For more automated workflows, consider using netlist converters or scripts available in the open-source community, such as netlist2schematic for KiCad.

Step-by-step conversion process

1. Export your CIR file from your SPICE simulator.
2. Convert the CIR file to a generic netlist format if necessary (using scripts or manual editing).
3. Open KiCad and create a new project.
4. In eeschema, use File → Import → Netlist to import the netlist.
5. Review and adjust the schematic, then save as a .sch file.

Tips and considerations

• Check for compatibility between your CIR netlist and the EDA tool's netlist format.
• Manual adjustments may be necessary to ensure symbols and connections are correct.
• Always verify the resulting schematic for accuracy before proceeding to PCB layout.