This circuit allows you to simulate an analog telephone line for the repair and testing of devices. The circuit is from 1994 and all the components used are common.
This circuit allows to obtain an output pulse independent, in duration, of the action time on...
This TTL circuit was obtained in a 1985 Italian magazine, but it can be easily implemented, as the...
In this circuit, the output voltage is Vxx plus the zener voltage. The circuit is from the SGS...