LIBRARY

Analog.Semiconductors.Tests.NPNTest

Test circuit for NPN: a resistively loaded common-emitter stage under a slow base ramp.

The base is driven 0 to 1 V over 1 s through 10 kΩ, with the collector fed from a 5 V rail through 1 kΩ. The run carries the device from cut-off through forward active into saturation: the collector resistor voltage rc.v tracks the collector current, rising from zero until the collector saturates near the ground rail.

The base resistor is not optional: an ideal source placed directly across the base-emitter junction sits across C_jE, which is structurally singular. The substrate pin is grounded, reproducing the upstream use_substrate = false behavior.

Usage

ElectricalComponents.Analog.Semiconductors.Tests.NPNTest()

Behavior

Source

"""
Test circuit for NPN: a resistively loaded common-emitter stage under a slow
base ramp.

The base is driven 0 to 1 V over 1 s through 10 kΩ, with the collector fed
from a 5 V rail through 1 kΩ. The run carries the device from cut-off through
forward active into saturation: the collector resistor voltage `rc.v` tracks
the collector current, rising from zero until the collector saturates near
the ground rail.

The base resistor is not optional: an ideal source placed directly across the
base-emitter junction sits across `C_jE`, which is structurally singular. The
substrate pin is grounded, reproducing the upstream `use_substrate = false`
behavior.
"""
test component NPNTest
  "Supply rail level (5 V)"
  supply_lvl = BlockComponents.Sources.Constant(k = 5) {
    "Dyad": {"placement": {"diagram": {"x1": 20, "y1": 220, "x2": 120, "y2": 320}}}
  }
  "Collector supply"
  supply = ElectricalComponents.Analog.Sources.VoltageSource() {
    "Dyad": {"placement": {"diagram": {"x1": 155, "y1": 335, "x2": 255, "y2": 435}}}
  }
  "Base ramp: 0 to 1 V over 1 s"
  bias_sig = BlockComponents.Sources.Ramp(height = 1, duration = 1) {
    "Dyad": {"placement": {"diagram": {"x1": 150, "y1": 120, "x2": 250, "y2": 220}}}
  }
  "Base drive"
  bias = ElectricalComponents.Analog.Sources.VoltageSource() {
    "Dyad": {"placement": {"diagram": {"x1": 285, "y1": 235, "x2": 385, "y2": 335}}}
  }
  "Base series resistance (10 kΩ)"
  rb = ElectricalComponents.Analog.Basic.Resistor(R = 10000) {
    "Dyad": {"placement": {"diagram": {"x1": 415, "y1": 130, "x2": 515, "y2": 230}}}
  }
  "Collector load resistor (1 kΩ)"
  rc = ElectricalComponents.Analog.Basic.Resistor(R = 1000) {
    "Dyad": {"placement": {"diagram": {"x1": 285, "y1": 20, "x2": 385, "y2": 120}}}
  }
  "Transistor under test"
  q = ElectricalComponents.Analog.Semiconductors.NPN() {
    "Dyad": {"placement": {"diagram": {"x1": 545, "y1": 130, "x2": 645, "y2": 230}}}
  }
  "Ground reference"
  ground = ElectricalComponents.Analog.Basic.Ground() {
    "Dyad": {"placement": {"diagram": {"x1": 415, "y1": 340, "x2": 515, "y2": 440}}}
  }
relations
  "Base drive starts at 0: junctions discharged, collector at the rail"
  initial q.V_BE = 0
  initial q.V_CS = 5
  connect(supply_lvl.y, supply.V) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 205, "y": 270}], "E": 2}], "path": {}}}
  connect(bias_sig.y, bias.V) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 335, "y": 170}], "E": 2}], "path": {}}}
  connect(supply.p, rc.p) {
    "Dyad": {
      "edges": [{"S": 1, "M": [{"x": 140, "y": 385}, {"x": 140, "y": 70}], "E": 2}],
      "path": {}
    }
  }
  connect(rc.n, q.c) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 595, "y": 70}], "E": 2}], "path": {}}}
  connect(bias.p, rb.p) {
    "Dyad": {
      "edges": [{"S": 1, "M": [{"x": 270, "y": 285}, {"x": 270, "y": 180}], "E": 2}],
      "path": {}
    }
  }
  connect(rb.n, q.b) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "path": {}}}
  connect(q.e, q.s, supply.n, bias.n, ground.g) {
    "Dyad": {
      "edges": [
        {
          "S": 1,
          "M": [{"x": 595, "y": 245}, {"x": 660, "y": 245}, {"x": 660, "y": 180}],
          "E": 2
        },
        {
          "S": 2,
          "M": [{"x": 670, "y": 180}, {"x": 670, "y": 490}, {"x": 270, "y": 490}],
          "E": -1
        },
        {"S": -1, "M": [], "E": 3},
        {"S": -1, "M": [{"x": 400, "y": 385}], "E": -2},
        {"S": -2, "M": [], "E": 4},
        {"S": -2, "M": [{"x": 465, "y": 285}], "E": 5}
      ],
      "junctions": [{"x": 270, "y": 385}, {"x": 400, "y": 285}],
      "path": {}
    }
  }
metadata {
  "Dyad": {"tests": {"case1": {"stop": 1, "expect": {"signals": ["q.V_BE", "rc.v"]}}}}
}
end

Flattened Source

"""
Test circuit for NPN: a resistively loaded common-emitter stage under a slow
base ramp.

The base is driven 0 to 1 V over 1 s through 10 kΩ, with the collector fed
from a 5 V rail through 1 kΩ. The run carries the device from cut-off through
forward active into saturation: the collector resistor voltage `rc.v` tracks
the collector current, rising from zero until the collector saturates near
the ground rail.

The base resistor is not optional: an ideal source placed directly across the
base-emitter junction sits across `C_jE`, which is structurally singular. The
substrate pin is grounded, reproducing the upstream `use_substrate = false`
behavior.
"""
test component NPNTest
  "Supply rail level (5 V)"
  supply_lvl = BlockComponents.Sources.Constant(k = 5) {
    "Dyad": {"placement": {"diagram": {"x1": 20, "y1": 220, "x2": 120, "y2": 320}}}
  }
  "Collector supply"
  supply = ElectricalComponents.Analog.Sources.VoltageSource() {
    "Dyad": {"placement": {"diagram": {"x1": 155, "y1": 335, "x2": 255, "y2": 435}}}
  }
  "Base ramp: 0 to 1 V over 1 s"
  bias_sig = BlockComponents.Sources.Ramp(height = 1, duration = 1) {
    "Dyad": {"placement": {"diagram": {"x1": 150, "y1": 120, "x2": 250, "y2": 220}}}
  }
  "Base drive"
  bias = ElectricalComponents.Analog.Sources.VoltageSource() {
    "Dyad": {"placement": {"diagram": {"x1": 285, "y1": 235, "x2": 385, "y2": 335}}}
  }
  "Base series resistance (10 kΩ)"
  rb = ElectricalComponents.Analog.Basic.Resistor(R = 10000) {
    "Dyad": {"placement": {"diagram": {"x1": 415, "y1": 130, "x2": 515, "y2": 230}}}
  }
  "Collector load resistor (1 kΩ)"
  rc = ElectricalComponents.Analog.Basic.Resistor(R = 1000) {
    "Dyad": {"placement": {"diagram": {"x1": 285, "y1": 20, "x2": 385, "y2": 120}}}
  }
  "Transistor under test"
  q = ElectricalComponents.Analog.Semiconductors.NPN() {
    "Dyad": {"placement": {"diagram": {"x1": 545, "y1": 130, "x2": 645, "y2": 230}}}
  }
  "Ground reference"
  ground = ElectricalComponents.Analog.Basic.Ground() {
    "Dyad": {"placement": {"diagram": {"x1": 415, "y1": 340, "x2": 515, "y2": 440}}}
  }
relations
  "Base drive starts at 0: junctions discharged, collector at the rail"
  initial q.V_BE = 0
  initial q.V_CS = 5
  connect(supply_lvl.y, supply.V) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 205, "y": 270}], "E": 2}], "path": {}}}
  connect(bias_sig.y, bias.V) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 335, "y": 170}], "E": 2}], "path": {}}}
  connect(supply.p, rc.p) {
    "Dyad": {
      "edges": [{"S": 1, "M": [{"x": 140, "y": 385}, {"x": 140, "y": 70}], "E": 2}],
      "path": {}
    }
  }
  connect(rc.n, q.c) {"Dyad": {"edges": [{"S": 1, "M": [{"x": 595, "y": 70}], "E": 2}], "path": {}}}
  connect(bias.p, rb.p) {
    "Dyad": {
      "edges": [{"S": 1, "M": [{"x": 270, "y": 285}, {"x": 270, "y": 180}], "E": 2}],
      "path": {}
    }
  }
  connect(rb.n, q.b) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "path": {}}}
  connect(q.e, q.s, supply.n, bias.n, ground.g) {
    "Dyad": {
      "edges": [
        {
          "S": 1,
          "M": [{"x": 595, "y": 245}, {"x": 660, "y": 245}, {"x": 660, "y": 180}],
          "E": 2
        },
        {
          "S": 2,
          "M": [{"x": 670, "y": 180}, {"x": 670, "y": 490}, {"x": 270, "y": 490}],
          "E": -1
        },
        {"S": -1, "M": [], "E": 3},
        {"S": -1, "M": [{"x": 400, "y": 385}], "E": -2},
        {"S": -2, "M": [], "E": 4},
        {"S": -2, "M": [{"x": 465, "y": 285}], "E": 5}
      ],
      "junctions": [{"x": 270, "y": 385}, {"x": 400, "y": 285}],
      "path": {}
    }
  }
metadata {
  "Dyad": {"tests": {"case1": {"stop": 1, "expect": {"signals": ["q.V_BE", "rc.v"]}}}}
}
end

Test Cases

Test Case case1

plt

plt

Related

• Examples

• Experiments

• Analyses

• Tests

  • Constant

  • Ground

  • NPN

  • Ramp

  • Resistor

  • VoltageSource