This is a simple home telephone ringtone generator circuit which is built with applying only several electronic components / parts. It generates simulated telephone ringtone and requires only DC ...

This produces variations in the strength of the electrical current traveling through the telephone circuit which are precisely the same as the variations in the vibrations of your voice.

Shown here is a circuit based on a micropower oscillator biased by the telephone line (see the figure). This oscillator generates a differential signal, which is coupled to a detector circuit via ...

The legacy form of an STL is a wired path. Traditionally supplied by the local telephone company, an analog wired circuit was once the most common form of STL. The most basic type of circuit is a dry ...