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.