Set up EDB for Power Integrity Analysis

This example shows how to set up the electronics database (EDB) for power integrity analysis from a single configuration file.

Import the required packages

import json

import os
import tempfile

from ansys.aedt.core import Hfss3dLayout
from ansys.aedt.core.downloads import download_file

from pyedb import Edb

AEDT_VERSION = "2024.2"
NG_MODE = False

Download the example PCB data.

temp_folder = tempfile.TemporaryDirectory(suffix=".ansys")
download_file(source="touchstone", name="GRM32_DC0V_25degC_series.s2p", destination=temp_folder.name)
file_edb = download_file(source="edb/ANSYS-HSD_V1.aedb", destination=temp_folder.name)

Load example layout

edbapp = Edb(file_edb, edbversion=AEDT_VERSION)

PyAEDT INFO: Logger is initialized in EDB.
PyAEDT INFO: legacy v0.31.0
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 2024.2
PyAEDT INFO: Cell main Opened
PyAEDT INFO: Builder was initialized.
PyAEDT INFO: EDB initialized.

Create an empty dictionary to host all configurations

cfg = dict()

Assign S-parameter model to capactitors.

Set S-parameter library path.

cfg["general"] = {"s_parameter_library": os.path.join(temp_folder.name, "touchstone")}

Assign the S-parameter model.

Keywords

• name. Name of the S-parameter model in AEDT.

• component_definition. Known as component part number of part name.

• file_path. Touchstone file or full path to the touchstone file.

• apply_to_all. When set to True, assign the S-parameter model to all components share the same component_definition. When set to False, Only components in “components” are assigned.

• components. when apply_to_all=False, components in the list are assigned an S-parameter model. When apply_to_all=False, components in the list are NOT assigned.

• reference_net. Reference net of the S-parameter model.

cfg["s_parameters"] = [
    {
        "name": "GRM32_DC0V_25degC_series",
        "component_definition": "CAPC0603X33X15LL03T05",
        "file_path": "GRM32_DC0V_25degC_series.s2p",
        "apply_to_all": False,
        "components": ["C110", "C206"],
        "reference_net": "GND",
    }
]

Define ports

Create a circuit port between power and ground nets.

Keywords

• name. Name of the port.

• reference_desinator.

• type. Type of the port. Supported types are ‘ciruict’, ‘coax’.

• positive_terminal. Positive terminal of the port. Supported types are ‘net’, ‘pin’, ‘pin_group’, ‘coordinates’.

• negative_terminal. Positive terminal of the port. Supported types are ‘net’, ‘pin’, ‘pin_group’, ‘coordinates’.

cfg["ports"] = [
    {
        "name": "port1",
        "reference_designator": "U1",
        "type": "circuit",
        "positive_terminal": {"net": "1V0"},
        "negative_terminal": {"net": "GND"},
    }
]

Define SIwave SYZ analysis setup

Keywords

• name. Name of the setup.

• type. Type of the analysis setup. Supported types are ‘siwave_ac’, ‘siwave_dc’, ‘hfss’.

• pi_slider_position. PI slider position. Supported values are from ‘0’, ‘1’, ‘2’. 0:speed, 1:balanced, 2:accuracy.

• freq_sweep. List of frequency sweeps.

  • name. Name of the sweep.

  • type. Type of the sweep. Supported types are ‘interpolation’, ‘discrete’, ‘broadband’.

  • frequencies. Frequency distribution.

    • distribution. Supported distributions are ‘linear_count’, ‘linear_scale’, ‘log_scale’.

    • start. Start frequency. Example, 1e6, “1MHz”.

    • stop. Stop frequency. Example, 1e9, “1GHz”.

    • increment.

cfg["setups"] = [
    {
        "name": "siwave_syz",
        "type": "siwave_ac",
        "pi_slider_position": 1,
        "freq_sweep": [
            {
                "name": "Sweep1",
                "type": "interpolation",
                "frequencies": [{"distribution": "log_scale", "start": 1e6, "stop": 1e9, "increment": 20}],
            }
        ],
    }
]

Define Cutout

Keywords

• signal_list. List of nets to be kept after cutout.

• reference_list. List of nets as reference planes.

• extent_type. Supported extend types are ‘Conforming’, ‘ConvexHull’, ‘Bounding’. For optional input arguments, refer to method pyedb.Edb.cutout()

cfg["operations"] = {
    "cutout": {
        "signal_list": ["1V0"],
        "reference_list": ["GND"],
        "extent_type": "ConvexHull",
    }
}

Write configuration into as json file

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

Import configuration into example layout

edbapp.configuration.load(config_file=file_json)

<pyedb.configuration.cfg_data.CfgData at 0x1e50f19abf0>

Apply configuration to EDB.

edbapp.configuration.run()

PyAEDT INFO: Cutout Multithread started.
PyAEDT INFO: Net clean up Elapsed time: 0m 2sec
PyAEDT INFO: Extent Creation Elapsed time: 0m 0sec
PyAEDT INFO: 1310 Padstack Instances deleted. Elapsed time: 0m 1sec
PyAEDT INFO: 265 Primitives deleted. Elapsed time: 0m 2sec
PyAEDT INFO: 702 components deleted
PyAEDT INFO: Cutout completed. Elapsed time: 0m 5sec

True

Save and close EDB.

edbapp.save()
edbapp.close()

True

The configured EDB file is saved in a temp folder.

print(temp_folder.name)

C:\Users\ansys\AppData\Local\Temp\tmpfdlyk17s.ansys

Load edb into HFSS 3D Layout.

h3d = Hfss3dLayout(edbapp.edbpath, version=AEDT_VERSION, non_graphical=NG_MODE, new_desktop=True)

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: PyAEDT version 0.12.dev0.
PyAEDT INFO: Initializing new Desktop session.
PyAEDT INFO: Log on console is enabled.
PyAEDT INFO: Log on file C:\Users\ansys\AppData\Local\Temp\pyaedt_ansys_3ca81012-e692-42e3-82dc-4385ff10e380.log is enabled.
PyAEDT INFO: Log on AEDT is enabled.
PyAEDT INFO: Debug logger is disabled. PyAEDT methods will not be logged.
PyAEDT INFO: Launching PyAEDT with gRPC plugin.
PyAEDT INFO: New AEDT session is starting on gRPC port 51595
PyAEDT INFO: AEDT installation Path C:\Program Files\AnsysEM\v242\Win64
PyAEDT INFO: Ansoft.ElectronicsDesktop.2024.2 version started with process ID 8132.
PyAEDT INFO: EDB folder C:\Users\ansys\AppData\Local\Temp\tmpfdlyk17s.ansys\edb/ANSYS-HSD_V1.aedb has been imported to project ANSYS-HSD_V1
PyAEDT INFO: Active Design set to 0;main
PyAEDT INFO: Aedt Objects correctly read

Analyze

h3d.analyze()

PyAEDT INFO: Key Desktop/ActiveDSOConfigurations/HFSS 3D Layout Design correctly changed.
PyAEDT INFO: Solving all design setups.
PyAEDT INFO: Key Desktop/ActiveDSOConfigurations/HFSS 3D Layout Design correctly changed.
PyAEDT INFO: Design setup None solved correctly in 0.0h 0.0m 31.0s

True

Plot impedance

solutions = h3d.post.get_solution_data(expressions="Z(port1,port1)")
solutions.plot()

PyAEDT INFO: Parsing C:/Users/ansys/AppData/Local/Temp/tmpfdlyk17s.ansys/edb/ANSYS-HSD_V1.aedt.
PyAEDT INFO: File C:/Users/ansys/AppData/Local/Temp/tmpfdlyk17s.ansys/edb/ANSYS-HSD_V1.aedt correctly loaded. Elapsed time: 0m 0sec
PyAEDT INFO: aedt file load time 0.03128814697265625
PyAEDT INFO: Loading Modeler.
PyAEDT INFO: Modeler loaded.
PyAEDT INFO: EDB loaded.
PyAEDT INFO: Layers loaded.
PyAEDT INFO: Primitives loaded.
PyAEDT INFO: Modeler class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: PostProcessor class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: Post class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: Solution Data Correctly Loaded.

Shut Down Electronics Desktop

h3d.close_desktop()

PyAEDT INFO: Desktop has been released and closed.

True

All project files are saved in the folder temp_file.dir. If you’ve run this example as a Jupyter notebook you can retrieve those project files.