Diode working

Danko

Joined Nov 22, 2017
1,829
Photodiode is simply diode.
Difference between diodes and photodiodes is in package.
Diodes usually are shielded from light, but photodiodes have transparent packages or windows,
which allow light access to semiconductor.
Diode in equivalent circuit is photodiode.
Under light semiconductor (more accurately p-n transition of diode) generates electrical current.
In equivalent circuit, current of current source imitates electrical current,
generated in diode under light.
ADDED:
Elements of both photodiodes in your circuit are connected in parallel, like in circuit below.
D1, D2 - diodes without capacitance.
V1, V2, V3, V4 - ammeters.
R1 - input resistance of amplifier.
1588627033462.png
 

Attachments

Last edited:
Top