5 (define vc (integral (delay dvc) vc0 dt))
6 (define dvc0 (scale-stream il (/ -1 C)))
7 (define il (integral (delay dil) il0 dt))
8 (define dil (add-streams (scale-stream vc (/ 1 L))
9 (scale-stream il (/ -R L))))
10 (stream-map (lambda (x y) (cons x y)) vc il)))