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Schematic diagram of an opto-isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on the right [note 1]. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. [1]
Optocouplers are used within a system to decouple a function block from another connected to the power grid or other high voltage, for safety and equipment protection. For example, power semiconductors connected to the line voltage may be switched by optocouplers driven from low-voltage circuits, which need not be insulated for the higher line ...
Opto-isolator VTL2C1 with LED input and photoresistor output. Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator [notes 1] or lamp-coupled photocell, [1] is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically ...
Silicon Labs Obsoletes Optocouplers with Drop-in Digital Isolators CMOS-Based Si87xx Isolators Offer Longer Device Lifetime and Superior Reliability, Enabling Manufacturers to Extend Product ...
Where no power need be transmitted, only digital data, the use of fiber optics can remove many ground loop problems, and sometimes safety problems too. Optical isolators or optocouplers are frequently used to provide ground loop isolation, and often safety isolation and can help prevent fault propagation.
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Fig. 1: Schematic of a flyback converter. The flyback converter is used in both AC/DC, and DC/DC conversion with galvanic isolation between the input and any outputs. The flyback converter is a buck-boost converter with the inductor split to form a transformer, so that the voltage ratios are multiplied with an additional advantage of isolation.
The Quadrantid meteor shower is one of the strongest, and quickest, meteor showers of the year. Here’s what you need to know to observe it during peak activity.