![]() ![]() Photodiodesīefore getting into phototransistors, it helps to understand how they are different from photodiodes. These circuits are simple enough that they can be brought into standard configurations in transistors, and their behavior can be easily adjusted by applying a base/gate voltage. This circuit provides linear response or stable switching behavior when photons are incident in the gate/drain region, creating an easy-to-use optical switch for a variety of applications. However, one very useful option is a phototransistor circuit. When we think of optical sensors, we usually think of something like a CCD, CMOS sensor, or photodiode. Your next electro-optical system might need a photodiode circuit. ![]()
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