Question

Is the photodiode active or passive?

Answer 1

Explanation:

Active component:

Devices having analogue electronic filters that can amplify signals or generate power gains are referred to as active components.

Solid-state devices and electron tubes are the two different categories of active components.

Passive components:

Chassis, inductors, resistors, transformers, and capacitors are examples of passive components.

Typically, a signal's power cannot be increased nor can it be amplified by passive components.

Photodiode:

1. A photodiode is a PN-junction diode that generates an electric current by absorbing light energy.
2. Since the query does not specify what kind of diode it is, there are various viewpoints on how diodes function. So, we can think about the straightforward rectifier diode.
3. The rectifier diode is a typical diode, also known as a p-n junction diode, which has two terminals for the anode and cathode.
4. The p-n junction diode's current-voltage characteristics are non-linear, monotonic, and lack a negative differential resistance. This diode permits current passage in one direction but prohibits it in another.
5. Current can only flow in one direction via this diode; the other direction is not permitted. It merely functions as a switch and has a limited capacity to release electric energy. Passive components control how this works.

Therefore, a diode is a passive component.