Improvements

Core

• Improve SymPy decorator. It would useful if SymPy provided this so that all its myriads of classes could be hidden behind a generic SymPy expression.

• Speed up residue calculation, perhaps by avoiding limits where possible.

• Generalise two-port representations.

• Provide consistent naming of Dirac delta, Heaviside unit step, etc.

• Add means so that SymPy can display imaginary values using j.

• Push inverse Laplace of rational functions into SymPy.

• Extend SymPy's Laplace transform so lower limit is -epsilon, where epsilon tends to zero. This will catch interesting events at t=0, such as Dirac deltas and Heaviside unit steps. Note, with the current definition, then a Dirac delta results in 1/2 instead of 1.

  >>> import sympy as sym
  >>> t = sym.symbols('t', real=True)
  >>> s = sym.symbols('s')
  >>> sym.laplace_transform(sym.DiracDelta(t), t, s)
  (1/2, -oo, True)

Netlists

• Add other controlled sources CCCS (F), VCCS (G), CCVS (H).
• Add mechanical/acoustical components.

Schematics

• Switch png images to svg for notebook but need to resolve shared namespace for multiple images.
• Add fully diffential amplifiers (FDA).
• Add transmission line element.
• Automatic component orientation!

General

• Add many more unit tests!