With this simple circuit it is possible to simulate a telephone line for carrying out repairs on telephone sets. The transformer must be 36 V and the diode can also be 1N4004.
This circuit uses an unusual component today which is the integrated circuit. We found this...
This circuit was found in an old American documentation. The operational used is of the...
In figure 1 we have an application for NLAS5113, a new device from On Semiconductor...