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Import Sources#

This example shows how to import voltage and current sources. In this example, we are going to

Download an example board
Create a configuration file
- Add a voltage source between two nets
- Add a current source between two pins
- Add a current source between two pin groups
- Add a current source between two coordinates
- Add a current source to the nearest pin
- Add distributed sources
Import the configuration file

Perform imports and define constants#

Perform required imports.

[1]:

import json
import toml
from pathlib import Path
import tempfile

from ansys.aedt.core.examples.downloads import download_file
from pyedb import Edb

Define constants.

[2]:

AEDT_VERSION = "2025.1"
NG_MODE = False

Download the example PCB data.

[3]:

temp_folder = tempfile.TemporaryDirectory(suffix=".ansys")
file_edb = download_file(source="edb/ANSYS-HSD_V1.aedb", local_path=temp_folder.name)

Load example layout#

[4]:

edbapp = Edb(file_edb, edbversion=AEDT_VERSION)

PyAEDT INFO: Logger is initialized in EDB.
PyAEDT INFO: legacy v0.50.1
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr  5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)]
PyAEDT INFO: Database ANSYS-HSD_V1.aedb Opened in 2025.1
PyAEDT INFO: Cell main Opened
PyAEDT INFO: Builder was initialized.
PyAEDT INFO: EDB initialized.

Create an empty dictionary to host all configurations#

[5]:

cfg = dict()

Add a voltage source between two nets#

Keywords

name. Name of the voltage source.
Reference_designator. Reference designator of the component.
type. Type of the source. Supported types are ‘voltage’, ‘current’
positive_terminal. Supported types are ‘net’, ‘pin’, ‘pin_group’, ‘coordinates’
- contact_radius. Optional. Set circular equipotential region.
- inline. Optional. When True, contact points are place in a row.
- num_of_contact. Optional. Number of contact points. Default is 1. Applicable only when inline is True.
negative_terminal. Supported types are ‘net’, ‘pin’, ‘pin_group’, ‘coordinates’
equipotential. Set equipotential region on pins when True.

[6]:

voltage_source = {
    "name": "V_SOURCE_5V",
    "reference_designator": "U4",
    "type": "voltage",
    "magnitude": 1,
    "positive_terminal": {"net": "5V", "contact_radius": "1mm"},
    "negative_terminal": {"net": "GND", "contact_radius": "1mm"},
    "equipotential": True,
}

Add a current source between two pins#

[7]:

current_source_1 = {
    "name": "I_CURRENT_1A",
    "reference_designator": "J5",
    "type": "current",
    "magnitude": 10,
    "positive_terminal": {"pin": "15"},
    "negative_terminal": {"pin": "14"},
}

Add a current source between two pin groups#

[8]:

pin_groups = [
    {"name": "IC2_5V", "reference_designator": "IC2", "pins": ["8"]},
    {"name": "IC2_GND", "reference_designator": "IC2", "net": "GND"},
]

[9]:

current_source_2 = {
    "name": "CURRENT_SOURCE_2",
    "type": "current",
    "positive_terminal": {"pin_group": "IC2_5V"},
    "negative_terminal": {"pin_group": "IC2_GND"},
}

Add a current source between two coordinates#

Keywords

layer. Layer on which the terminal is placed
point. XY coordinate the terminal is placed
net. Name of the net the terminal is placed on

[10]:

current_source_3 = {
    "name": "CURRENT_SOURCE_3",
    "type": "current",
    "equipotential": True,
    "positive_terminal": {"coordinates": {"layer": "1_Top", "point": ["116mm", "41mm"], "net": "5V"}},
    "negative_terminal": {"coordinates": {"layer": "Inner1(GND1)", "point": ["116mm", "41mm"], "net": "GND"}},
}

Add a current source reference to the nearest pin#

Keywords

reference_net. Name of the reference net
search_radius. Reference pin search radius in meter

[11]:

current_source_4 = {
    "name": "CURRENT_SOURCE_4",
    "reference_designator": "J5",
    "type": "current",
    "positive_terminal": {"pin": "16"},
    "negative_terminal": {"nearest_pin": {"reference_net": "GND", "search_radius": 5e-3}},
}

Add distributed current sources#

Keywords

distributed. Whether to create distributed sources. When set to True, ports are created per pin

[12]:

sources_distributed = {
    "name": "DISTRIBUTED",
    "reference_designator": "U2",
    "type": "current",
    "distributed": True,
    "positive_terminal": {"net": "5V"},
    "negative_terminal": {"net": "GND"},
}

Add setups in configuration#

[13]:

cfg["pin_groups"] = pin_groups
cfg["sources"] = [
    voltage_source,
    current_source_1,
    current_source_2,
    current_source_3,
    current_source_4,
    sources_distributed,
]

Write configuration into as json file#

[14]:

file_json = Path(temp_folder.name) / "edb_configuration.json"
with open(file_json, "w") as f:
    json.dump(cfg, f, indent=4, ensure_ascii=False)

Equivalent toml file looks like below

[15]:

toml_string = toml.dumps(cfg)
print(toml_string)

[[pin_groups]]
name = "IC2_5V"
reference_designator = "IC2"
pins = [ "8",]

[[pin_groups]]
name = "IC2_GND"
reference_designator = "IC2"
net = "GND"

[[sources]]
name = "V_SOURCE_5V"
reference_designator = "U4"
type = "voltage"
magnitude = 1
equipotential = true

[sources.positive_terminal]
net = "5V"
contact_radius = "1mm"
[sources.negative_terminal]
net = "GND"
contact_radius = "1mm"
[[sources]]
name = "I_CURRENT_1A"
reference_designator = "J5"
type = "current"
magnitude = 10

[sources.positive_terminal]
pin = "15"
[sources.negative_terminal]
pin = "14"
[[sources]]
name = "CURRENT_SOURCE_2"
type = "current"

[sources.positive_terminal]
pin_group = "IC2_5V"
[sources.negative_terminal]
pin_group = "IC2_GND"
[[sources]]
name = "CURRENT_SOURCE_3"
type = "current"
equipotential = true

[sources.positive_terminal.coordinates]
layer = "1_Top"
point = [ "116mm", "41mm",]
net = "5V"
[sources.negative_terminal.coordinates]
layer = "Inner1(GND1)"
point = [ "116mm", "41mm",]
net = "GND"
[[sources]]
name = "CURRENT_SOURCE_4"
reference_designator = "J5"
type = "current"

[sources.positive_terminal]
pin = "16"
[sources.negative_terminal.nearest_pin]
reference_net = "GND"
search_radius = 0.005
[[sources]]
name = "DISTRIBUTED"
reference_designator = "U2"
type = "current"
distributed = true

[sources.positive_terminal]
net = "5V"
[sources.negative_terminal]
net = "GND"

Import configuration into example layout#

[16]:

edbapp.configuration.load(config_file=file_json)
edbapp.configuration.run()

[16]:

True

Review#

[17]:

edbapp.siwave.sources

[17]:

{'V_SOURCE_5V': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a860>,
 'I_CURRENT_1A': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a9b0>,
 'CURRENT_SOURCE_2': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696aaa0>,
 'CURRENT_SOURCE_3': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696ab60>,
 'CURRENT_SOURCE_4': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66968a00>,
 'U2_5V_39': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a590>,
 'U2_5V_40': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c669697b0>,
 'U2_5V_41': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a7d0>,
 'U2_5V_42': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a830>,
 'U2_5V_43': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66969780>,
 'U2_5V_44': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a200>,
 'U2_5V_45': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66968940>,
 'U2_5V_46': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66969720>,
 'U2_5V_47': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c669688e0>,
 'U2_5V_48': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a1a0>,
 'U2_5V_49': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c669696c0>,
 'U2_5V_50': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c6696a170>,
 'U2_5V_51': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66968850>,
 'U2_5V_60': <pyedb.dotnet.database.edb_data.ports.ExcitationSources at 0x21c66968820>}

Save and close Edb#

The temporary folder will be deleted once the execution of this script is finished. Replace edbapp.save() with edbapp.save_as(“C:/example.aedb”) to keep the example project.

[18]:

edbapp.save()
edbapp.close()

PyAEDT INFO: EDB file save time: 0.00ms
PyAEDT INFO: EDB file release time: 0.00ms

[18]:

True

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