Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
Photocurrent amplification ?
Thanks for comments. Here is a bit more detail. The second stage provides a gain of -160, with R1=4k7 & R2=750k. During testing I didn't have the second stage driving anything. I have made some modifications which have helped the circuit. Firstly, the photodiode was not across the OPAs inputs...- acp32
- Post #4
- Forum: Circuit design
-
Photocurrent amplification ?
I desperately require some circuitry advice before I go mad! I have built some interface circuits for silicon photodiodes (quadrant detector) which seem to work on a knife edge. I have tried different op amps with low input bias currents, all have not seemed immuned from problems. In the latest...- acp32
- Thread
- Replies: 4
- Forum: Circuit design
