What Distinguishes a Phototransistor from a Photodiode?

Comments · 98 Views

What Distinguishes a Phototransistor from a Photodiode?

A phototransistor is what?


A phototransistor is a photosensitive transistor that is used to boost the photocurrent produced by changing the energy of light.


It is either a two-terminal or a three-terminal device, depending on the design. It might be a BJT (Bipolar Junction Transistor) or a three-layer FET (Field Effect Transistor).


The emitter, collector, and base area are its three regions. When compared to a typical BJT, the collector region has a bigger area. Through a lens that concentrates the light, it penetrates the base region and creates electron-hole pairs, which create a photocurrent.


Similar to BJT transistors, it contains two PN junctions.


A photodiode: What Is It?


A photodiode is a photosensitive diode that converts light energy into electricity. It is constructed out of silicon or germanium. It is a single-PN junction device that employs the photoelectric effect as its governing theory.


NEON is a supplier of highly designed commercial and military off-the-shelf or custom modules created for today's state-of-the-art defense systems and high-speed optical communication network infrastructures. NEON pioneered RF photonics, microwave photonics, and optical delay line technology in order to successfully implement features like ultra-wideband, high dynamic range, RF system integration, etc. From NEON, you can choose and purchase a high-speed photodetector.