transistordatabase 0.5.1

Transistor Database

.. sectnum::

########################### Transistordatabase ###########################

The Transistordatabase is a tool developed by LEA from the University Paderborn which helps working with choosing transistors for the developement of electronics. When it comes to the point of choosing a transistor, there is typically a lot of trouble with different programs. Often there are multiple programs for calculating transistor parameters and a schematic simulator to verify the results. Now your colleague is working on a different electronics topology and may use different programs. This is a problem because in most cases your transistors will never be compatible with the ones from your colleague. The Transistordatabase now solves this problem: Here Transistors can be saved in a database and makes them easy to interchange between platforms. It is possible to export Transistor data to various simulation software and share it to a colleague using a .json-File.

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Why_transistordatabase.png :align: center :alt: Why transistor database?

Functionality overview

---

Here are some examples on the functionality of the Transistordatabase:

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Workflow.png :align: center :alt: Workflow

• digitize transistor datasheet parameters and graphs and save it to the TDB (Transistordatabase)
• use this data for calculations in python (e.g. some loss calulations for a boost-converter)
• export this data to matlab for calculations in matlab
• export transistors to GeckoCIRCUITS simulation program
• export transistors to Simulink simulation program
• export transistors to PLECS simulation program

.. note:: Development status: Alpha

########################### Features ###########################

There are 3 features implemented in the Transistordatabase. First is the python interface which can be used to manage the Database and their Transistors. The python interface can also be used to implemement optimization routines. Then there is a GUI which is mostly used to manage the Database and visualize different properties of the stored Transistors. As the third feature the Transistordatabase can be updated by an Online-Database. You can choose to work with our Online Repository or create your own if needed.

Python interface

---

Use the transistor data in you self-written optimization program, see figure:

• Automatic calculate your converter losses with many different transistors
• Search the database for usable transistors for your application
• Functions provided, to search for closest operating point
• Functions provided, to linearize the transistor/diode conduction behaviour
• Functions provided, to calculate the output capacitances Energy from the C_oss-curve
• Use own loss measurements for above features (coming soon)

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/documentation/workflow_wp.png :align: center :alt: optimization

GUI

---

• Manage, store and search the transistors
• Export transistor models to programs like GeckoCIRCUITS, PLECS, Matlab/Octave
• Compare transistors (interpolate switch loss data for new gate resistors and temperatures, ...)

Here are some screenshots of the GUI:

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/gui_database.png :align: center :alt: gui_database

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/gui_comparison.png :align: center :alt: gui_comparison

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/gui_create_transistor.png :align: center :alt: gui_create_transistor

Transistordatabase Fileexchange

---

This <https://github.com/upb-lea/transistordatabase_File_Exchange>__ repository contains the Transistors currently added to the Transistordatabase. Every Transistor from this repository can be automatically downloaded to your local Database. Since this only relies on the index.txt containing the links to each transistor which shall be downloaded it is possible to create your own repository. Next to the Transistor updates there is a list of housing types and module manufacturers which are supported by the Database which are also set in the Fileexchange respository.

You can publish your own Transistors to this repository by generating a pull request. If you don't want to create a github account, you can also send the .json file to this :email:email address <[e-mail]>.

############ Installation ############

Windows

---

Install Python

Install latest Python version: Link <https://www.python.org/>__.

Install Pycharm (optional)

Installation file <https://www.jetbrains.com/pycharm/download/download-thanks.html?platform=linux&code=PCC>_.

Download and run executable

Download exe-file here <https://groups.uni-paderborn.de/lea/public/downloads/transistordatabase.zip>_

Linux

---

Ubuntu

.. code-block::

sudo apt install python3 python3-pip

.. note:: Install pycharm from Snapstore

All Operating systems: Install the transistor database

---

Inside pycharm, create a new project. Select 'new environment using' -> 'Virtualenv'. |br| As a base interpreter, select 'C:\Users\xxxxxx\AppData\Local\Programs\Python\Python39\Python.exe'. Click on create. |br| Navigate to file -> settings -> Project -> Python Interpreter -> '+' -> search for 'transistordatabase' -> 'Install Package' |br|

########################## Complete documentation ########################## The complete documentation can be found here <https://upb-lea.github.io/transistordatabase/main/transistordatabase.html>__.

########################## Usage ##########################

Minimal python example

---

.. code-block::

from transistordatabase.database_manager import DatabaseManager

# Path for json files
path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "tdb_example")

# Create DatabaseManager instance and set it to json format
tdb_json = DatabaseManager()
tdb_json.set_operation_mode_json(path)

# Print database
tdb_json.print_tdb()

# load a transistor from the database
transistor_loaded = tdb_json.load_transistor('CREE_C3M0016120K')

In addition to that in this file <https://github.com/upb-lea/transistordatabase/blob/main/transistordatabase/housing_types.txt>_ there are more simple examples.

Generate a new transistor

---

Transistor object basics

Transistor |br| | |br| +-Metadata |br| | |br| +-Switch |br| | +-Switch Metadata |br| | +-Channel Data |br| | +-Switching Data |br| | |br| +-Diode |br| | +-Diode Metadata |br| | +-Channel Data |br| | +-Switching Data |br| | |br| +-wp (temporary storage for further calculations) |br|

Reading curves from the datasheet

For reading datasheet curves, use the tool WebPlotDigitizer <https://apps.automeris.io/wpd/>_. There is a online-version available. Also you can download it for Linux, Mac and Windows. WebPlotDigitizer is open source software.

Channel data for switch and diode always needs to be positive. Some Manufacturers give diode data in the 3rd quadrant. Here is an example how to set the axes and export the data inside WebPlotDigitizer:

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Diode_channel_data_negative.png :align: center :alt: diode channel data negative

Use the template to generate a new transistor object

After digitizing the curves, you can use a template to generate a new transistor object and store it to the database. For this, see the template </template_example/template_example.py>_.

Some values need to follow some rules, e.g. due to different spelling versions, the manufacturers name or housing types must be written as in the lists below. Some general hints to fill the template:

* `List of manufacturers <https://github.com/upb-lea/transistordatabase/blob/main/transistordatabase/module_manufacturers.txt>`_
* `List of housing types <https://github.com/upb-lea/transistordatabase/blob/main/transistordatabase/housing_types.txt>`_
* `Fuji housing overview <https://www.fujielectric.com/products/semiconductor/model/igbt/2pack.html>`_

In many cases, two capacity curves are specified in the data sheets. One curve for the full voltage range, and one with zoom to a small voltage range. To represent the stored curves in the best possible way, both curves can be read in and then merged.

.. code-block::

c_rss_normal = csv2array('transistor_c_rss.csv', first_x_to_0=True)
c_rss_detail = csv2array('transistor_c_rss_detail.csv', first_x_to_0=True)

transistor_args = {
               ...
               'c_rss': {"t_j": 25, "graph_v_c": c_rss_merged},
			   ...
               }

Usage of Transistor.wp. in your programs

---

There is a subclass .wp where you can fill for further program calculations.

Full-automated example

Use the quickstart method to fill in the wp-class

There is a search function, that chooses the closes operating point. In the full-automated method, there are some predefined values

* Chooses transistor.switch.t_j_max - 25°C as operating temperature to start search
* Chooses transistor.i_abs_max/2 as operating current to start search
* Chooses v_g = 15V as gate voltage to start search

.. code-block::

transistor_loaded.quickstart_wp()

Half-automated example

Fill in the wp-class by a search-method to find the closes working point to your methods

Insert a working point of interest. The algorithm will find the closest working point and fills out the Transistor.wp.-class .. code-block::

transistor_loaded.update_wp(125, 15, 50)

Non-automated example

Fill in the wp-class manually

Look for all operating points manually. This will result in an error in case of no match. .. code-block::

transistor_loaded.wp.e_oss = transistor_loaded.calc_v_eoss()
transistor_loaded.wp.q_oss = transistor_loaded.calc_v_qoss()

# switch, linearize channel and search for losscurves
transistor_loaded.wp.switch_v_channel, transistor_loaded.wp.switch_r_channel = transistor_loaded.calc_lin_channel(25, 15, 150, 'switch')
transistor_loaded.wp.e_on = transistor_loaded.get_object_i_e('e_on', 25, 15, 600, 2.5).graph_i_e
transistor_loaded.wp.e_off = transistor_loaded.get_object_i_e('e_off', 25, -4, 600, 2.5).graph_i_e

# diode, linearize channel and search for losscurves
transistor_loaded.wp.diode_v_channel, transistor_loaded.wp.diode_r_channel = transistor_loaded.calc_lin_channel(25, -4, 150, 'diode')

Calculations with transistor objects

---

Parallel transistors

To parallel transistors use the function.

• In case of no parameter paralleling is for 2 transistors
• In case of parameter, paralleling is for x transistors. Example here is for three transistors.

.. code-block::

parallel_transistorobject = tdb_json.parallel_transistors(transistor_loaded, 3)

After this, you can work with the transistor object as usual, e.g. fill in the .wp-workspace or export the device to Matlab, Simulink or GeckoCIRCUITS.

######################### Export transistor objects #########################

Using transistors within pyhton you have already seen. Now we want to take a closer look at exporting the transistors to other programs. These exporters are currently working. Some others are planned for the future.

Export a Virtual datasheet

---

This function exports a virtual datasheet to see stored data in the database. Function display the output path of .html-file, which can be opened in your preferred browser.

.. code-block::

# Windows users: export datasheet
transistor_loaded.export_datasheet()

# Linux users: export datasheet as html
# look for CREE_C3M0016120K.html in your current working directory
html_str = transistor_loaded.export_datasheet(build_collection=True)
Html_file = open(f"{transistor_loaded.name}.html", "w")
Html_file.write(html_str)
Html_file.close()

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Virtual_Datasheet.png :align: center :alt: Generated virtual datasheet example

Export to GeckoCIRCUITS

---

GeckoCIRCUITS is an open source multi platform schematic simulator. Java required. Direct download link <http://gecko-simulations.com/GeckoCIRCUITS/GeckoCIRCUITS.zip>_. At the moment you need to know the exporting parameters like gate resistor, gate-voltage and switching voltage. This will be simplified in the near future.

.. code-block::

transistor_loaded.export_geckocircuits(True, 600, 15, -4, 2.5, 2.5)

From now on, you can load the model into your GeckoCIRCUITS schematic.

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Example_Gecko_Exporter.png :align: center :alt: GeckoExporter usage example

.. hint:: It is also possible to control GeckoCIRCUITS from python, e.g. to sweep transistors. In this case, linux users should consider to run this <https://github.com/tinix84/gecko/releases/tag/v1.1>_ Version of GeckoCIRCUITS instead the above one (port to OpenJDK).

Export to PLECS

---

For a thermal and loss simulation using PLECS simulation tool, it requires the transistor loss and characteristic curves to be loaded in XML(Version 1.1) file format. More information on how to load the XML data can be found from here. To export the transistor object from your database to plecs required xml file format, following lines need to be executed starting with loading the required datasheet.

.. code-block::

transistor_loaded.export_plecs()

Outputs are xml files - one for switch and one for diode (if available), which can be then loaded into your schematic following the instructions as mentioned here <https://www.plexim.com/support/videos/thermal-modeling-part-1>__. Note that if channel curves for the default gate-voltage are found missing then the xml files could not be possible to generate and a respective warning message is issued to the user. The user can change the default gate-voltage and switching voltage by providing an extra list argument as follows:

.. code-block::

transistor_loaded.export_plecs([15, -15, 15, 0])

Note that all the four parameters (Vg_on, Vg_off) for IGBTs/Mosfets and (Vd_on, Vd_off) for reverse/body diodes are necessary to select the required curves that needs to be exported to switch and diode XMLs respectively.

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/PLECS_thermal_editor.png :align: center :alt: PLECS thermal exporter usage example

Export to Simulink

---

For a loss simulation in simulink, there is a IGBT model available, which can be found in this simulink model <https://de.mathworks.com/help/physmod/sps/ug/loss-calculation-in-a-three-phase-3-level-inverter.html>_ . Copy the model to you schematic and fill the parameters as shown in the figure. Export a transistor object from your database by using the following command. Example for a Infineon transistor. .. code-block::

transistor_loaded = db.load_transistor('Infineon_FF200R12KE3')
transistor_loaded.export_simulink_loss_model()

Output is a .mat-file, you can load in your matlab program to simulate. Now, you are able to sweep transistors within your simulation. E.g. some matlab-code:

.. code-block::

load Infineon_FF200R12KE3_Simulink_lossmodel.mat;
load Infineon_FF300R12KE3_Simulink_lossmodel.mat;
load Fuji_2MBI200XBE120-50_Simulink_lossmodel.mat;
load Fuji_2MBI300XBE120-50_Simulink_lossmodel.mat;
Transistor_array = [Infineon_FF200R12KE3 Infineon_FF300R12KE3 Fuji_2MBI200XBE120-50 Fuji_2MBI300XBE120-50];
for i_Transistor = 1:length(Transistor_array)
    Transistor = Transistor_array(i_Transistor);
    out = sim('YourSimulinkSimulationHere');

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Example_Simulink_Exporter.png :align: center :alt: Simulink exporter usage example

Export to Matlab/Octave

---

Python dictionary can be exported to Matlab, see the following example:

.. code-block::

transistor_loaded = db.load_transistor('Fuji_2MBI100XAA120-50')
transistor_loaded.export_matlab()

A .mat-file is generated, the exporting path will be displayed in the python console. You can load this file into matlab or octave.

.. image:: https://raw.githubusercontent.com/upb-lea/transistordatabase/main/sphinx/images/Matlab.png :align: center :alt: Matlab .mat exporter usage example

####### Others #######

For developers

---

Currently the transistordatabase does not only support a json format but also a mongodb database. Therefore mongodb needs to be installed: Install with standard settings. Use the MongoDB community server, as platform, choose windows Link <https://www.mongodb.com/try/download/community>__.

Roadmap

---

Planned features in 2024

• Focus on adding self-measured data to the database
• Working with self-measured data in exporters
• Usability improvements
• Stable software

Organisation

---

Bug Reports

Please use the issues report button within github to report bugs.

Changelog

Find the changelog here <https://github.com/upb-lea/transistordatabase/blob/main/CHANGELOG.md>__.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. For contributing, please refer to this section <https://github.com/upb-lea/transistordatabase/blob/main/Contributing.rst>_.

About

---

History and project status

This project started in 2020 as a side project and was initially written in matlab. It quickly became clear that the project was no longer a side project. The project should be completely rewritten, because many new complex levels have been added. To place the project in the open source world, the programming language python is used.

In January 2021 a very early alpha status was reached. First pip package was provided in may 2021. First GUI is provided in June 2022.

License

Licensed under GPLv3 <https://choosealicense.com/licenses/gpl-3.0/>_

.. |br| raw:: html

  <br>

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased - Date

0.5.1 - 2024-06-22

Fixed

• Documentation pipeline issue

0.5.0 - 2024-06-22

Added

• Non-linear capacitance file export for GeckoCIRCUITS
• Introduction of database manager. See the template_example.py for API changes.

Fixed

• Fix some GUI data does not accept float or negative values
• Fix reading GUI graph_r_e curves

Changed

• API has changed according to the introduction of the database manager. See the template_example.py for API changes.

0.4.1 - 2022-07-18

Added

• General: Option to delete transistors from local database
• General: Gecko Exporter for GaN-Transistors: mirror 1. quadrant forward characteristic to 3rd quadrant
• GUI: Add options to display virtual and original datasheet for selected transistor
• #90: Add email-workflow to add new transistor to the transistordatabase file exchange (TDB-FE)
• Add log(x), log(y) for adding/viewing plots

Fixed

• Fix PDF preview not working due to a workaround
• #93: GUI Manufacturer parameters for switch and diode must be optional
• Fix GUI measurement integration method when integrating own measurement.
• Fix some GUI data does not accept float or negative values
• Fix some wrong labels: Units in C-curves

0.4.0 - 2022-06-20

Added

• NEW: Graphical User Interface: Download exe-file, - or run the file "gui.py" within the directory ".../transistordatabase/transistordatabase/gui" to start the GUI

Fixed

• #82: update_from_fileexchange() leads to failure in case of no internet connection
• #84: Process is still running when closing main window
• #85: Ignore missing-data messages at GUI startup
• #87: Database not visible in exe-file

0.3.3 - 2022-03-20

Changed

• do not re-assign r_th and c_th values when loading/creating a transistor object (do not run calc_thermal_params())
• Workaround for brocken export_datasheet(): temporary only html-files available instead of pdf-files

0.3.2 - 2022-02-02

Added

• Add Rohm to manufacturer list

Changes

• Method 'print_TDB()' changes to 'print_tdb()'
• export_dataheet() can handle with measurement data

0.3.1 - 2021-12-15

Bugfixes

• #68: Improved user warning in case of no mongodb installed
• #70: Save .json-files in multiple lines, to avoid that a small change is very difficult to see in version control
• #71, #72: fix get_object_i/r_e_simplified

0.3.0 - 2021-12-09

Added

• NEW: Option to add own measurements to the database
• Add function export_all_datasheets()
• #61: Add Keys to add R_DS,ON vs. junction temperature
• #62: Add Keys for Gate Charge Curve
• #63: Add Keys for Safe-Operating-Area

Updated

• #59: simplify the usage of tdb.load('transistorname') instead of tdb.load({'name': 'transistorname'})

Bugfixes

• #51: Mutable List in export_plecs
• #58: Fix some units displayed in virtual datasheet
• #66: Cannot get the corresponding datasheet according to the procedures in the tutorial
• #67: Problem when exporting all transistors from the database to virtual datasheet

0.2.14 - 2021-11-02

Added

• Helper function 'collect_i_e_and_r_e_combination' to find and associate i_e and r_e based SwitchEnergyData objects for usage in gecko exporter
• Helper function 'check_keys' to validate the arguments provided to gecko exporter
• constants.py: dictates the default gate voltages for switch and diodes types based on the module type
• #50: Introduce new transitsor keys: r_g_on_recommended and r_g_off_recommended

Updated

• Docstrings
• updated calc_thermal_params function to normalize the limit selections for curve fitting
• update to module manufacturers list and housing type list
• #27: Update gecko exporter according to latest working
• remodelled gecko exporter with added feature to find the nearest neighbours to the given v_supply, v_g, r_g if the exact curves doestn't exists
• remodelled gecko exporter with added feature to re-estimate the loss curves at given gate resistor
• Added case to handle gecko exporter request to find nearest neighbours in find_next_gate_voltage method
• update find_next_gate_voltage method to include the check_specific_curves parameter which now skips the curves while finding out nearest neighbours

Bugfixes

• fix #48: export_datasheet fails when exporting a SiC-MOSFET
• fix #49: Print housing_list and manufacturer_list in case of not maching housings/manufacturers when creating a transistor

0.2.13 - 2021-09-30

Added

• #37: Function to calculate thermal parameters from given thermal curve
• scipy curve fitting method is utilized to extract thermal parameters

Updated

• Docstrings
• added calc_thermal_params function call to init block of transistor object to calculate the missing thermal parameters

Bugfixes

• #19: Problems in Windows when removing cloned repo

0.2.12 - 2021-09-15

Added

• Transistor method 'compare_channel_linearized()' to compare channel data with linearized data
• Sphinx documentation, see here

Updated

• Docstrings

Bugfixes

• #44: Choose another linearisation default current for quickstart_wp()
• #48: Crash when exporting virtual datasheet

0.2.11 - 2021-08-07

Added

• #40 Read two curves for parasitic capacitance

Small Improvements

• #35 Add Datasheet Hyperlink to Simulink loss model exporter
• #34, #36 Display all exported file folders clickable
• Datasheet link (.export_datasheet()) is also clickable and opens the browser to display the datasheet
• #38 Update template with new examples
• Small changes on datasheet displaying

Bugfixes

• fix #43: Problem when paralleling transistors with no r-th-curve given
• fix #39: Problem when exporting datasheet with not r_th_vector and tau_vector variables

0.2.10 - 2021-07-27

Added

• #14 Virtual datasheet for IGBT and MOSFET types which collects all the plot and data of transistor switch and diode and presents a HTMl file. Use 'transistor.export_datasheet()'

Bugfixes

• fix #32: incorrect template paths in PLECS exporter

0.2.9 - 2021-07-14

Bugfixes

• fix #30: Bad package dependency in setup.py

0.2.8 - 2021-07-14

Added

• #25 Allows only positive channel data to be stored or created for both switch and diode types, added mirror_xy_data attribute in csv2array function to do so.
• #28 Integrated calculating curve characteristics at different r_g values into simuliunk exporter and added exception handlers
• #29 Code cleanup and added recheck functionality for plecs exporter to find new gate voltage
• #29 Added plecs exporter for MOSFET and IGBT modules (outputs separate switch type and diode type xmls)

Changed

• #22 Moved exporter functions to transistor classes and removed exportFunctions.py

0.2.7 - 2021-06-28

Added

• Module manufacturers, fix compatibility problem in 0.2.6

0.2.6 - 2021-06-27

Bugfixes

• #3, #8 : fixes to avoid typo errors in manufacturer and housing types along with comment line additions

Added

• method 'parallel_transistors()' to parallel transistors object of same type

Changed

• rewrite export_to_matlab() function

Removed

• remove dependency from matlab-pip-package

0.2.5 - 2021-06-10

Added

• export_simulink_loss_model using new functions to search transistor elements (incl. fix #17)

Removed

• export_simulink_v1 (outdated)

0.2.4 - 2021-05-28

Added

• #13: GeckoCircuits Exporter exports mirrowed conducting characterisitc for negative currents

Bugfixes

• #11, #12: Path displays when export to gecko (.scl) or to .json

0.2.3 - 2021-05-21

Added

• Simple calculation method for mosfet gate resistor (Paper PCIM 2006: D.Kübrich 'Invetsigation of Turn-Off Behaviour under the Assumption of Linear Capacitances')

Bugfix

• bug #7: was not fully fixed. Fixed now.
• bug #9: in case of no err-data, fill working point with object instead of list

0.2.2 - 2021-05-11

Added

• print_TDB() returns a list with transistor names
• add some CREE power module housing types

Bugfix

• fix #6: Avoid KeyError when using devices without err-losscurves
• fix #7: wrong fill of wp.xxx_r_channel/xxx_v_channel when using transistor.update_wp() or transistor.quickstart_wp()

0.2.1 - 2021-05-06

Bugfix

• Problem when reading .csv-files generated by english-language systems

0.2.0 - 2021-05-04

Added

• Example template to generate a transistor object
• transistor method: linearize_switch_ui_graph
• transistor.switch methods: print_all_channel_data, print_channel_data_vge, print_channel_data_temp
• New class LinearizedModel: Contains data for a linearized Switch/Diode depending on given operating point.
• New class to store c_iss, c_oss, c_rss in Transistor.
• New Transistor attribute: e_coss
• Documentation drawing
• Exporter: GeckoCIRCUITS
• calc_object_i_e to calculate loss loss curves for other gate resistors/voltage levels
• New class 'wp' to store local calculation parameters to use in your program
• automatically fill 'wp' objects when using functions like find_approx_wp()
• added a quick start to fill in 'wp' values quick and easy
• New housing types
• .json exporter

Removed

• Removed Metadata class. Added its attributes to Transistor class instead

Changed

• Restructured foster thermal model argument handover
• Rename package to transistordatabase (instead of transistor_database) due to pip package rules
• csv2array callable with options
• move some functionality out of transistor class (tdb.Transistor. -> tdb.)

0.1.0 - 2021-02-04

Added

• Construct a Transistor-object and save relevant data in its attributes and subclasses
• Class structure documented in a class UML diagram
• Save Transistor-object in an object database created with mongodb
• Mandatory attributes and restricted types/values to guarantee only valid and functional Transistors can be added to the database
• Matlab-Exporter