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. The feedback photodiode captures a percentage of the LED’s flux and generates a control signal which can be used to servo the LED drive current. Linear optocouplers couples AC as well as DC signals. It has high gain stability as well as low input-output capacitance. Linear optocouplers consumes less power and provide excellent linearity along with stability. Most of the high-performance linear optocouplers provide higher signal coupling precision. Unlike standard optocouplers, linear optocouplers operate in a servo mode configuration which compensates for LED’s non-linear time and temperature characteristics. Linear optocouplers can be used with the aid of operational amplifiers in closed loop conditions to achieve highly linear and electrically isolated AC and DC signal amplifiers.
Need for high gain stability and low power consumption and increase in demand for industrial and high-reliability markets as well as applications are some of the primary factors driving the growth of the global linear optocouplers market. However, linear optocouplers are more affected by current drive conditions as the detector operates in a high-injection region when the LED produces normal light output and does not have the extra operating margin that is inherent in digital optocouplers. This poses a restrain to the global linear optocouplers market. Although LED degradation is often the dominant degradation mechanism in space, degradation of optocouplers with improved LEDs is limited by photo response degradation. In recent times, low cost and versatile linear optocoupler circuits had been used to reduce the noise as well as ground loop errors in measurements. Fast analog isolation can be achieved with the help of linear optocouplers. Companies are striving to upgrade their research and development activities to lead innovations in this field.
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The global linear optocouplers market can be segmented on the 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. Linear optocouplers are useful in switch mode power supplies. Linear optocouplers are designed to provide higher signal coupling precision. On the basis of industry vertical, the global linear optocouplers market can be classified into telecommunications, military and aerospace, and industrial motors and automotive, among others. In terms of region, the global linear optocouplers market can be categorized into, Middle East & Africa, Europe, the Americas, and Asia Pacific.
Key players operating in the global linear optocouplers market include Fairchild Semiconductor, Toshiba, Vishay Intertechnology, Inc, Renesas Electronics, Siemens, Infineon Technologies, Skyworks Solutions and Sharp Corporation.