This repository contains analog/mixed-signal IC design projects with support for both standalone Spectre workflows (primary, command-line driven) and OCEAN/GUI workflows (legacy, Virtuoso-based).

smrct/
├── models/verilogA/          # Device models (Verilog-A)
├── devices/                  # Device-level designs
│   └── nanopore/
│       ├── netlist/          # Shared subcircuit definitions
│       ├── testbenches/
│       │   ├── standalone/   # Primary: Self-contained Spectre testbenches
│       │   └── ocean/        # Legacy: OCEAN-compatible netlists
│       ├── scripts/
│       │   ├── *.sh         # Standalone simulation scripts (cad-spec)
│       │   ├── *.py         # Analysis/post-processing scripts
│       │   └── legacy/      # OCEAN scripts (.ocn files)
│       └── results/
│           ├── standalone/   # Results from standalone workflows
│           └── ocean/        # Results from OCEAN workflows
├── circuits/                 # Circuit-level designs (future)
├── systems/                  # System-level designs (future)
├── lib/                      # Shared libraries and utilities
└── docs/                     # Documentation

Command-line driven workflow using cad-spec directly:

# Navigate to device directory
cd devices/nanopore

# Run I-V characterization
./scripts/run_standalone_iv.sh

# Analyze results (placeholder - to be implemented)
./scripts/analyze_iv.py

Advantages:

• Fully scriptable and automatable
• Version control friendly
• No GUI dependencies
• Faster iteration for batch simulations

GUI-driven workflow using Virtuoso ADE and OCEAN:

# Navigate to device directory
cd devices/nanopore

# Run OCEAN script
ocean -nograph -replay scripts/legacy/run_iv.ocn

Use cases:

• Integration with existing Virtuoso projects
• Interactive waveform viewing
• ADE Explorer compatibility

1. Models: VerilogA models are in models/verilogA/
2. Devices: Device-level testbenches are in devices/*/testbenches/standalone/
3. Simulation: Run standalone scripts from devices/*/scripts/
4. Results: Check devices/*/results/standalone/ for output

• Primary workflow: Use standalone Spectre testbenches for new designs
• Version control: All netlists, scripts, and models are tracked; results are ignored
• File organization: Keep subcircuit definitions in netlist/, testbenches in testbenches/standalone/
• Scripts: Place simulation drivers in scripts/, analysis tools alongside