Relays are used to connect, or disconnect, ring generators to-and-from telephone lines. If the two points are at different potentials, there are high-current transients at the moment of contact. This ...

This application note shows the user how to implement a zero cross detector with a minimum of external components. It should be noted that this solution will not give any galvanic isolation for the ...

To properly control ac sources using solid-state devices, you need a pulse to signal the start of the ac’s rising edge. Most of the time, however, tremendous noise levels plague power lines. There ...