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In which form optocouplers are available in market?
The Optocouplers Market is segmented by Product Type (IC Output Optocouplers, Transistor Output Optocouplers, Motor Drive Optocouplers), End-user Industry (Automotive, Consumer Electronics, Industrial, Communication, Medical, Military, and Aerospace), and Geography.
What is opto coupling?
Opto-coupler is an electronic component that transfers electrical signals between two isolated circuits. Optocoupler also called Opto-isolator, photo coupler or optical isolator.
Which feature of an optical isolator makes it attractive to use?
The wavelength blocking feature makes the optical isolator a very attractive device for use with optical amplifier in order to protect them from backward reflections.
Which is an example of an optocoupler circuit?
There are many different applications for optocoupler circuits, so there are many different design requirements, but a basic design for an optocoupler providing isolation for example between two circuits, simply involves the choice of appropriate resistor values for the two resistors R1 and R2 shown in Fig. 5.2.1.
How much voltage can an opto coupler handle?
In present commercial market, we can buy Opto-coupler with 10 kV to 20 kV input to output withstand voltage capacity, with a specification of 25 kV / uS voltage transients. This the internal structure of the opto-coupler.
What is the voltage of an optocoupler gate?
Assuming that a single HCT output is only feeding this optocoupler, a logic 1 voltage of about 4.9V can be presumed. The output current available from a HCT gate to drive the optocoupler input is limited to 4mA, which is quite low for driving an optocoupler.
Why does an optocoupler have a high saturation voltage?
You could also place the transistor on the high side with a resistor between emitter and output ground, so when the input goes high the output at the emitter is high too. But beware, most common optos have a high saturation voltage because of the limited base drive, sometimes in the order of 1 Volt!