Photodiode Amplifier Circuit

Thread Starter

pblanos

Joined Jan 23, 2014
8
Hello,

can anybody explain to me the principles of the attached Photodiode Amplifier Circuit attached and more specifically why the capacitor in the red circle is used in this circuit?

I would appreciate any answer as I am new to understanding photodiode principles.

Thank you in advance.

Panos
 

Attachments

AlbertHall

Joined Jun 4, 2014
12,345
The capacitor passes on to the second amplifier the AC component of the amplified photo-diode signal. This removes any effect of static lighting, e.g. sunlight.
 
Top