"On the engineers' new toolbox" or Analog Circuit Design, using Symbolic   Analysis, Computer Algebra, and Elementary Network Transformations
  In this paper, by way of three examples - a fourth order low pass active RC filter, a rudimentary BJT amplifier, and an LC ladder - we show, how the algebraic capabilities of modern computer algebra systems can, or in the last example, might be brought to use in the task of designing analog circuits. 
Eberhard H.-A. Gerbracht
cs.SC cs.CE cs.DM