Optocoupler is a passive optical component that can combine or split transmission data (optical power) from optical fibers. It is an electronic device which transfers electrical signals by using light waves. Linear optocouplers provide coupling with electrical isolation between its input and output when the electrical signals are transferred using light waves. Linear optocouplers consist of one LED optically coupled to two matched photodiode detectors. Photodiode detectors are used for excellent linearity. The photodiode on the input side acts as a feedback device permitting an external feedback loop to ensure constant LED light output. A similar matching photodiode on the output side is used to drive an output circuit that is electrically isolated from the input. A fixed relationship is thus maintained between input and output. Linear optocouplers consist of an AlGaAs IRLED irradiating an isolated feedback as well as an output PIN photodiode in a bifurcated arrangement. ...