Example / inverting-amplifier / geist-darkExpectation matched

Focus summing

A five-pin op-amp has input and feedback resistors at the inverting summing node, a grounded noninverting input, output feedback, and two separate supply rails. The summing node connects RIN.b, RF.a, U1.inverting; the other nets remain distinct.

feedbackmulti-pindifferentialvirtual-groundseparate-railsfocusnet/circuit/nets/summing

Scroll horizontally on smaller screens to inspect legible nodes and labels. No simulation is performed.

The original input stays intact, including invalid fields.

Open in editor Download JSON Download SVG ↓

Expected vs. actual

An inspectable result.

These checks compare the renderer outcome with the declared case expectation. The stress test also checks determinism, geometry, and connectivity.

Expected: Successful SVG render
Actual: SVG rendered0 diagnostics
Case check: Passed
Recipe / theme: Inverting operational amplifiergeist-dark

The circuit graph, not its drawing

Electrical nodes & connectivity

Each net is one electrical node: the named endpoints below are connected. Component pins and external ports are endpoints. These counts are not the number of geometric junction dots or wire bends. No voltages, currents, or simulation results are inferred.

Components: 3
Electrical nodes / nets: 6
Component pins: 9
External ports: 5
Connected endpoints: 14

Electrical nodes from normalized circuit.nets
Net / electrical node	Endpoints	Connected component pins and ports
`ground`	2	`GND` `U1.noninverting`
`input`	2	`RIN.a` `VIN`
`negative_supply`	2	`U1.vminus` `VMINUS`
`output`	3	`RF.b` `U1.output` `VOUT`
`positive_supply`	2	`U1.vplus` `VPLUS`
`summing`	3	`RF.a` `RIN.b` `U1.inverting`

Structured feedback

Diagnostics / 0

No diagnostics. The renderer accepted this source and produced the figure above.

Original figure document · JSON

{
  "version": 1,
  "circuit": {
    "components": {
      "RIN": {
        "type": "resistor",
        "resistance": 10000
      },
      "RF": {
        "type": "resistor",
        "resistance": 100000
      },
      "U1": {
        "type": "op-amp"
      }
    },
    "ports": {
      "VIN": {
        "kind": "terminal"
      },
      "VOUT": {
        "kind": "terminal"
      },
      "VPLUS": {
        "kind": "terminal"
      },
      "VMINUS": {
        "kind": "terminal"
      },
      "GND": {
        "kind": "ground"
      }
    },
    "nets": {
      "input": [
        "VIN",
        "RIN.a"
      ],
      "summing": [
        "RIN.b",
        "RF.a",
        "U1.inverting"
      ],
      "output": [
        "U1.output",
        "RF.b",
        "VOUT"
      ],
      "ground": [
        "U1.noninverting",
        "GND"
      ],
      "positive_supply": [
        "U1.vplus",
        "VPLUS"
      ],
      "negative_supply": [
        "U1.vminus",
        "VMINUS"
      ]
    }
  },
  "layout": {
    "preset": "inverting-amplifier",
    "roles": {
      "inputResistor": "RIN",
      "feedback": "RF",
      "amplifier": "U1",
      "input": "VIN",
      "output": "VOUT",
      "positiveSupply": "VPLUS",
      "negativeSupply": "VMINUS",
      "ground": "GND"
    }
  },
  "presentation": {
    "title": "Focus summing",
    "theme": {
      "preset": "geist-dark"
    },
    "highlight": {
      "components": [],
      "nets": [
        "summing"
      ]
    }
  }
}

Expected outcome & actual diagnostics · JSON

{
  "id": "inverting-amplifier/focus-net-summing/geist-dark",
  "expectation": {
    "kind": "render"
  },
  "actual": {
    "ok": true,
    "diagnostics": []
  },
  "passed": true
}

Rendered bounds & renderer version · JSON

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  "bounds": {
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    "height": 1200,
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      "title": {
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      "subtitle": {
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      "assumption": {
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      },
      "VIN:port": {
        "x": 132.6,
        "y": 556.8,
        "width": 34,
        "height": 14.200000000000045
      },
      "VOUT:port": {
        "x": 1346.6,
        "y": 601.48,
        "width": 46.600000000000136,
        "height": 14.840000000000032
      },
      "VPLUS:port": {
        "x": 1030.6,
        "y": 433.48,
        "width": 58.51999999999998,
        "height": 14.839999999999975
      },
      "VMINUS:port": {
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        "y": 913.48,
        "width": 70.51999999999998,
        "height": 14.840000000000032
      },
      "RIN:id": {
        "x": 385.06,
        "y": 527.22,
        "width": 29.880000000000052,
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      },
      "RIN:value": {
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        "y": 550.576,
        "width": 70.34400000000005,
        "height": 17.807999999999993
      },
      "RF:id": {
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        "y": 272.22,
        "width": 19.25999999999999,
        "height": 12.779999999999973
      },
      "RF:value": {
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        "width": 84.74399999999991,
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      },
      "U1:id": {
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        "width": 19.440000000000055,
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      "U1:value": {
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        "width": 169.68000000000006,
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      "GND:port": {
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    "symbols": {
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      "RF": {
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      "U1": {
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      },
      "GND": {
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    },
    "routes": {
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        {
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      "summing": [
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        {
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        {
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        {
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      ],
      "ground": [
        {
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        },
        {
          "x": 738.5,
          "y": 693.5,
          "width": 3,
          "height": 248
        }
      ],
      "positive_supply": [
        {
          "x": 948.5,
          "y": 438.5,
          "width": 3,
          "height": 83
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      ],
      "negative_supply": [
        {
          "x": 948.5,
          "y": 778.5,
          "width": 3,
          "height": 143
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      ]
    }
  }
}