Ahkab

Version 0.12 represents the culmination of efforts dating back to May and contains 142 commits.

This release has no new features, but it has several bug fixes and it introduces Python3 support (!).

Moreover, many commits were devoted to improving the documentation: you can find the new, improved documentation at http://ahkab.readthedocs.org/en/latest/

Features added:

*None.*

Changes from contributors and pull requests merged:

*None.*

Bugs fixed, short list:

* BUGFIX: Respect the user config when saving to file.
* BUGFIX: Respect CLI-specified transient DFs.
* BUGFIX: use the warning interface.
* BUGFIX: always set the simulation options before running tests.
* BUGFIX: fix detection of wd
* BUGFIX: .include now recovers the path relative to the netlist
* BUGFIX: fix printing of .DC statements.
* BUGFIX: fix comparison of int and NoneType (new Python behaviour)

Version 0.11 represent the culmination of four months of efforts.

Features added:

* Add Pole-Zero (.pz) analysis.
* Add sparse matrix support and LU factorization with SuperLU.
* AC solutions data is returned as complex floats.
* The brute-force PSS algo is now known as 'brute-force'.

Ahkab also got considerably faster in DC/OP/TRAN/PSS analyses.

A PY3 version passing the whole test suite is available in the
repository.

Changes from contributors and pull requests merged:

*None.*

Bugs fixed, short list:

* BUGFIX: AC sweeps consistently default to LOG.
* BUGFIX: Convert print_netlist_elem_line to get_...
* BUGFIX: parse_analysis() is not a generator anymore`.
* BUGFIX: Remove print_circuit(), use print(circuit).
* BUGFIX: EKV devices now match the usual constructor.
* BUGFIX: do not attempt to print conv. details if sing. MNA
* BUGFIX: Use ndarrays (almost) everywhere, drop mats.
* BUGFIX: Don't crash if a plot label is not found.
* BUGFIX: CMIN-related crash.
* BUGFIX: Remove hack for now closed bug in sympy.
* BUGFIX: Reset sim options before skipping a test.

Bugs fixed, short list:

* BUGFIX: allow printing of PSS results.
* BUGFIX: inductor coupling and time function parsing.
* BUGFIX: fix checking of symbolic results.
* BUGFIX: InductorCoupling: init syntax and `add print_netlist_elem_line()`.
* BUGFIX: fix regression in TF calculation (wrong sympy assumptions).
* BUGFIX: function parsing
* BUGFIX: fix 'autonomous' dest value.
* BUGFIX: `modify_x0_for_ic()` should NOT modify op results.
* BUGFIX: op table size
* BUGFIX: MOSQ init param order
* BUGFIX: Symbolic analysis bugfix.
* BUGFIX: Fix DC sweeps.
* BUGFIX: Fix dict access of OP results. OP info now goes to info file.
* BUGFIX: Deep copy `an_list` so that we can pop out items as we please transparently to the user.
* BUGFIX: take the file.op into account. Also abs paths.
* BUGFIX: load_csv crash, add late check for headers consistency.
* BUGFIX: Fix the sine function. Notice the meaning of theta changed with this commit.
* BUGFIX: Correct assumptions in subs.
* BUGFIX: fix `element.part_id` in subckts
* BUGFIX: testing, do not compare time exec results from different machines.

Changes from contributors and pull requests merged:

* Incorporate most changes from weilawei.
* Merge pull request 18 from endolith/patch-1
* Merge branch 'patch-1' of https://github.com/mightyiam/ahkab

Features added:

* Use `__version__.py` for versioning
* Diode: Enable caching. Simplify interfaces.
* Allow running lists of analyses, or 1 analysis alone too.
* Add gnd as `mycirc.gnd`.
* Add command line entry point to `setup.py`.
* Testing: Add APITest to automate testing of the `ahkab` Python interface.
* Testing: Test suite running on Travis, with coverage.
* Testing: Selective test skipping on Travis-CI

Changes:

* Massive refactoring of the code base: enforce PEP8 everywhere.
* Symbolic: transfer functions are results instances too.
* Plotting: remove useless functions, keep some as internal-only.
* `get_headers_index(..., load_headers=[])` returns all header indices.
* Testing: No reference runs with nose.
* Ticker: simplify the ticker API.
* Speed up the matrix assembly precomputing conductances
* Allow printing out to stdout also `if filename == '-' or sys.stdout`
* Matplotlib auto backend selection for machines without `$DISPLAY`
* Rewrite csvlib to use numpy's R&W methods
* Elements now print out their own netlist entries.
* Move `convergence_check()` to utilities.
* Use relative imports and move to single versioning of files.
* Remove def. values from time functions

Thanks to weilawei**, endolith, mightyiam for their contributions.

** Big thanks man, excellent job.

Changes in previous versions, in brief:

2/0913
* Added support for voltage-controlled switches

20/08/13
* Improved diode model with temperature support (but no capacitances).

8/8/13
* Dropped psycho support.
* Re-added the quadratic law MOS transistor model.
* Updated wiki pages and examples.
* Many small fixes.

20/12/11
* Ahkab can now be run in a Python program.

04/01/11
* Dropped gnuplot support, ahkab now requires matplotlib.