Optocoupler is a passive optical component that can combineor split transmission data (optical power) from optical fibers. It is anelectronic device which transfers electrical signals by using light waves.Linear optocouplers provide coupling with electrical isolation between itsinput and output when the electrical signals are transferred using light waves.Linear optocouplers consist of one LED optically coupled to two matchedphotodiode detectors. Photodiode detectors are used for excellent linearity.The photodiode on the input side acts as a feedback device permitting anexternal feedback loop to ensure constant LED light output. A similar matchingphotodiode on the output side is used to drive an output circuit that iselectrically isolated from the input. A fixed relationship is thus maintainedbetween input and output. Linear optocouplers consist of an AlGaAs IRLEDirradiating an isolated feedback as well as an output PIN photodiode in abifurcated arrangement. The feedback photodiode captures a percentage of theLED’s flux and generates a control signal which can be used to servo the LEDdrive current. Linear optocouplers couples AC as well as DC signals. It hashigh gain stability as well as low input-output capacitance. Linearoptocouplers consumes less power and provide excellent linearity along withstability. Most of the high-performance linear optocouplers provide highersignal coupling precision. Unlike standard optocouplers, linear optocouplersoperate in a servo mode configuration which compensates for LED’s non-lineartime and temperature characteristics. Linear optocouplers can be used with theaid of operational amplifiers in closed loop conditions to achieve highlylinear and electrically isolated AC and DC signal amplifiers.

Need for high gain stability and low power consumption andincrease in demand for industrial and high-reliability markets as well asapplications are some of the primary factors driving the growth of the globallinear optocouplers market. However, linear optocouplers are more affected bycurrent drive conditions as the detector operates in a high-injection regionwhen the LED produces normal light output and does not have the extra operatingmargin that is inherent in digital optocouplers. This poses a restrain to theglobal linear optocouplers market. Although LED degradation is often thedominant degradation mechanism in space, degradation of optocouplers withimproved LEDs is limited by photo response degradation. In recent times, lowcost and versatile linear optocoupler circuits had been used to reduce thenoise as well as ground loop errors in measurements. Fast analog isolation canbe achieved with the help of linear optocouplers. Companies are striving toupgrade their research and development activities to lead innovations in thisfield.

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 The global linear optocouplers market can be segmented onthe basis of application, industry vertical, and region. Based on application,the linear optocouplers market can be divided into medical sensor isolation,audio signal interfacing, power management, sensing & instrumentation, medical,audio, communications & networking as well as digital telephone isolation.Linear optocouplers can be used in digital telephone line isolation. Linearoptocouplers are useful in switch mode power supplies. Linear optocouplers aredesigned to provide higher signal coupling precision. On the basis of industryvertical, the global linear optocouplers market can be classified intotelecommunications, military and aerospace, and industrial motors andautomotive, among others. In terms of region, the global linear optocouplersmarket can be categorized into, Middle East & Africa, Europe, the Americas,and Asia Pacific.

Key players operating in the global linear optocouplersmarket include Fairchild Semiconductor, Toshiba, Vishay Intertechnology, Inc,Renesas Electronics, Siemens, Infineon Technologies, Skyworks Solutions andSharp Corporation.

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