i need help understanding how these diodes work and what is their function ?
1.Photodiode 2.Varacter diode 3.Tunnel diode
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Ferry
Joined September 20, 2018 8Thursday at 02:04 PM
A photodiode is similar to battery that produces current in the forward directions when light shines on the photodiode.
A varacter diose is similar to capacitor/condenser whose capacitance changes with reverse voltage across it. A varacter diode is used to adjust a tuned circuit resonant frequency by changing the DC voltage across diode.
A tunnel diode is similar to an ordinary diode where except that it has a -Ve resistance over part of the VI forward characteristics.
These are the differences between three of them/ each has its unique applications and can be used within one circuit board or within multiple.