You can search for automatically created analog curcuits here: http://www.genetic-programming.com/humancompetitive.html http://www.genetic-programming.com/human

You can search for automatically created analog curcuits here: http://www.genetic-programming.com/humancompetitive.html http://www.genetic-programming.com/humancompetitive.html There are also examples and explanations in John Koza's "Genetic Programming" series of books.