simple continued fraction (thing)

It should also be noticed that the following infinite fraction :

                                 1
               x = a + ------------------------
                                       1  
                         b  +  ----------------
                                         1
                               c + ------------
                                           1
                                      d + -----
                                          ... 

can be synthesized by the following electrical ladder network :

           ____           ____          ____
          /    \         /    \        /    \
O---------  a   ---------   c  --------   e  --------- . . .
          \____/   _|_   \____/  _|_   \____/  _|_
                  /   \         /   \         /   \ 
                  |   |         |   |         |   |
                  | b |         | d |         | f |
                  |   |         |   |         |   |
                  \___/         \___/         \___/
                    |             |             |
O----------------------------------------------------- . . .

in case it x represents an impedance and by the following electrical ladder network :

                    ____          ____
                   /    \        /    \
O------------------   b  --------   d  --------------- . . .
             _|_   \____/  _|_   \____/  _|_
            /   \         /   \         /   \ 
            |   |         |   |         |   |
            | a |         | c |         | e |
            |   |         |   |         |   |
            \___/         \___/         \___/
              |             |             |
O----------------------------------------------------- . . .

in case it x represents an admittance.