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Circuit analysis environment for Python

License: Other

Python 18.13% Tcl 0.14% GAP 0.16% Shell 0.03% AGS Script 81.50% Makefile 0.03%

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dreyfert michaelnt hohe gadamc mikebrinson pythonngspice vovkd haskeller zonyzhao manasdas17 fsabado tfwalther rowhit tom00ti sfgorky

pycircuit's Issues

pycircuit.org is down?

Hi all,

don't have an access to docs on pycircuit.org.

Vadim

Noise analysis for multiple frequencies

Supplying an array of frequencies to Noise.solve (as can be done for AC.solve) doesn't work. These are treated as a single frequency inside Noise.solve, making the analysis fail.

Load psf waveforms on demand

Opening a large (700M) transient results file loads the complete file into memory, which is slow and uses lots of memory.

Would it be possible load the trace names and other meta data on open but then only load the waveforms on demand.

pycircuit.circuit.tests.test_analysis_symbolic.test_symbolic_noise_kt_over_C

This test fails for me running python 2.7 and sympy 0.7.1

The use of vars is probably a bad idea as it puts symbols into the global namespace. Some of the tests in this file rely on the symbol s being defined by earlier tests, but I'm not sure why this test is failing.

======================================================================
ERROR: pycircuit.circuit.tests.test_analysis_symbolic.test_symbolic_noise_kt_over_C
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/data/Work/pycircuit/pycircuit/circuit/tests/test_analysis_symbolic.py", line 131, in test_symbolic_noise_kt_over_C
    noise_voltage_power = simplify(integrate(svnout, (w, 0, oo)))
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/utilities/decorator.py", line 24, in threaded_func
    return func(expr, *args, **kwargs)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/integrals/integrals.py", line 847, in integrate
    return integral.doit(deep = False)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/integrals/integrals.py", line 364, in doit
    antideriv = self._eval_integral(function, xab[0])
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/integrals/integrals.py", line 577, in _eval_integral
    parts.append(coeff * ratint(g, x))
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/integrals/rationaltools.py", line 88, in ratint
    R = log_to_real(h, q, x, t)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/integrals/rationaltools.py", line 254, in log_to_real
    if len(R_u) != R.count_roots():
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/polytools.py", line 2802, in count_roots
    count = f.rep.count_real_roots(inf=inf, sup=sup)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/polyclasses.py", line 743, in count_real_roots
    return dup_count_real_roots(f.rep, f.dom, inf=inf, sup=sup)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/rootisolation.py", line 654, in dup_count_real_roots
    signs_inf = dup_sign_variations([ dup_LC(s, K)*(-1)**dup_degree(s) for s in sturm ], K)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/densetools.py", line 1126, in dup_sign_variations
    if coeff*prev < 0:
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/polyclasses.py", line 1278, in __lt__
    _, _, _, F, G = f.frac_unify(g)
  File "/data/Work/pycircuit/py27/local/lib/python2.7/site-packages/sympy/polys/polyclasses.py", line 1028, in frac_unify
    raise UnificationFailed("can't unify %s with %s" % (f, g))
UnificationFailed: can't unify DMF(([[]], [[1]]), ZZ) with 0

w1 is a 3x4x5 waveform
w2 is 3x4 waveform

w1-w2 should produce a 3x4x5 result

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