{
  "signal": [
    {
      "name": "origin",
      "wave": "0...1.....0...",
      "node": "....a..ef.b..."
    },
    {
      "name": "pwm_A",
      "wave": "1....0....1...",
      "node": ".....c.g..."
    },
    {
      "name": "pwm_B",
      "wave": "1...0......1..",
      "node": "........h..d.."
    }
  ],
  "edge": [
    "a|->c RED",
    "b|->d FED",
    "e<->g Invert",
    "f<->h Invert"
  ],
  "head": {
    "text": "Active Low"
  }
}