SLIDE 1
Goals
HDL Netlist qflow A few seconds Human A few hours Schematic
An Automatic Schematic Generation Tool for SPICE Netlists Aidan - - PowerPoint PPT Presentation
An Automatic Schematic Generation Tool for SPICE Netlists Aidan - - PowerPoint PPT Presentation
An Automatic Schematic Generation Tool for SPICE Netlists Aidan Goettsch Poolesville High School Goals qflow Human HDL Netlist Schematic A few seconds A few hours Goals (cont.) Be useful for manual repairs to a circuit
SLIDE 2
SLIDE 3
Goals (cont.)
- Be useful for manual repairs to a circuit
- Netlist created by a schematic tool needs to be useful and very similar to the
input
- Doesn’t need to be perfect
- Support open source schematic entry tools
○ KiCad EESchema ○ Xschem
SLIDE 4
Samples
Basic Medium
SLIDE 5
Samples
Medium Mux Parity
SLIDE 6
Samples
Mux 4-1
SLIDE 7
Performance
SLIDE 8
Algorithm
SPICE Input Scoring Select Constraint Maximise
- ne at a time
KiCAD Xschem
Constraints Sum
SLIDE 9
Other Applications
- Robust Python library
○ Reading netlists and symbol libraries ○ Writing schematics
- Schematic interoperability
○ A tool doesn’t need to write a full schematic to a universal form, could use a netlist with additional metadata
SLIDE 10
Future Work
- Further optimization
○ Significantly larger schematics take much longer to run
- Potential to improve overarching algorithm
○ Experiment with tree based refinement
- Better & more constraints
- Analog schematics
○ First steps are on GitHub issues
SLIDE 11
Acknowledgements
- Tim Edwards
- Mr. Lee & Poolesville High School staff
SLIDE 12