Opto-isolator cleanly separates signal and high-power
The opto-isolator, short for optical isolator, or also sometimes referred to as an optocoupler or photocoupler, has become the industry standard component for providing electrical isolation.
The most common application for the opto-isolator is in a protective role, isolating sensitive signal circuitry from potentially destructive voltage spikes. A primary example of this use can be found in a FAX machine or MODEM, both of which require isolation from the telephone line to prevent the creation of a ground path in the chance of a lightning strike.
Also known as a ground loop isolator or a loop isolator, this device likewise removes ground loops and thus excess noise or electro-magnetic interference (EMI). The combination of reduced noise and circuit protection features are useful in switching power supply and motor control applications.
The NEC Electronics Corporation has been developing opto-electronic components for over thirty years. Today, technology developed for the communications industry utilises NEC Electronics' components to increase opto-isolator performance.
