Circuit: Simulate multi-zones layout with Siwave

This example shows how you can use PyAEDT simulate multi-zones with Siwave.

Perform required imports

Perform required imports, which includes importing a section.

from pyaedt import Edb, Circuit
import os.path
import pyaedt

Download file

Download the AEDB file and copy it in the temporary folder.

temp_folder = pyaedt.generate_unique_folder_name()
edb_file = pyaedt.downloads.download_file(destination=temp_folder, directory="edb/siwave_multi_zones.aedb")
working_directory = os.path.join(temp_folder, "workdir")
aedt_file = os.path.splitext(edb_file)[0] + ".aedt"
circuit_project_file = os.path.join(working_directory, os.path.splitext(os.path.basename(edb_file))[0] +
                               "multizone_clipped_circuit.aedt")
print(edb_file)

D:\Temp\pyaedt_prj_TFI\edb/siwave_multi_zones.aedb

Set AEDT version

Set AEDT version.

aedt_version = "2024.1"

Ground net

Common reference net used across all sub-designs, Mandatory for this work flow.

common_reference_net = "GND"

Project load

Load initial Edb file, checking if aedt file exists and remove to allow Edb loading.

if os.path.isfile(aedt_file):
    os.remove(aedt_file)
edb = Edb(edbversion=aedt_version, edbpath=edb_file)

C:\actions-runner\_work\pyaedt\pyaedt\testenv\lib\site-packages\pyedb\dotnet\edb_core\components.py:185: DeprecationWarning: Use new property :func:`instances` instead.
  warnings.warn("Use new property :func:`instances` instead.", DeprecationWarning)

Project zones

Copy project zone into sub project.

edb_zones = edb.copy_zones(working_directory=working_directory)

Split zones

Clip sub-designs along with corresponding zone definition and create port of clipped signal traces.

defined_ports, project_connexions = edb.cutout_multizone_layout(edb_zones, common_reference_net)

C:\actions-runner\_work\pyaedt\pyaedt\testenv\lib\site-packages\pyedb\dotnet\edb_core\stackup.py:409: DeprecationWarning: `stackup_mode` is deprecated. Use `mode` method instead.
  warnings.warn("`stackup_mode` is deprecated. Use `mode` method instead.", DeprecationWarning)

Circuit

Create circuit design, import all sub-project as EM model and connect all corresponding pins in circuit.

circuit = Circuit(specified_version=aedt_version, projectname=circuit_project_file)
circuit.connect_circuit_models_from_multi_zone_cutout(project_connections=project_connexions,
                                                      edb_zones_dict=edb_zones, ports=defined_ports,
                                                      model_inc=70)

C:\actions-runner\_work\_tool\Python\3.10.9\x64\lib\subprocess.py:1072: ResourceWarning: subprocess 10708 is still running
  _warn("subprocess %s is still running" % self.pid,
C:\actions-runner\_work\pyaedt\pyaedt\testenv\lib\site-packages\pyaedt\generic\settings.py:383: ResourceWarning: unclosed file <_io.TextIOWrapper name='D:\\Temp\\pyaedt_ansys.log' mode='a' encoding='cp1252'>
  self._logger = val

True

Setup

Add Nexxim LNA simulation setup.

circuit_setup= circuit.create_setup("Pyedt_LNA")

Frequency sweep

Add frequency sweep from 0GHt to 20GHz with 10NHz frequency step.

circuit_setup.props["SweepDefinition"]["Data"] = "LIN {} {} {}".format("0GHz", "20GHz", "10MHz")

Start simulation

Analyze all siwave projects and solves the circuit.

circuit.analyze()

True

Define differential pairs

circuit.set_differential_pair(assignment="U0.via_38.B2B_SIGP", reference="U0.via_39.B2B_SIGN", differential_mode="U0")
circuit.set_differential_pair(assignment="U1.via_32.B2B_SIGP", reference="U1.via_33.B2B_SIGN", differential_mode="U1")

True

Plot results

circuit.post.create_report(expressions=["dB(S(U0,U0))", "dB(S(U1,U0))"], context="Differential Pairs")

<pyaedt.modules.report_templates.Standard object at 0x0000027A17B93B50>

Release AEDT desktop

circuit.release_desktop()

True