Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi,
Sorry for the late reply. I found the problem ! Thanks Keith for pointing me in the right direction : it wasn't the fluorescent lights (almost no influence) but the computer and oscilloscope monitors ! They generate a rather large ~100Khz signal in my circuit ! If I turn the screen off and...
It is not really periodic, more like random pulses that are around 10us in width... I checked all my power supply lines, there no such noise in there. I couldn't check the current coming from my photodiode because it is really small.
Tomorrow I'll try to replace the OPA606 with some other...
Yep sorry I meant 100Khz :) The DC level varies with ambient light. There is a 50Hz component due to the light, but I can filter that out wihout problems. I don't have high frequency noise (I've got a 150Mhz scope, doesn't show any other noise apart from this ~100Khz noise)
Mike
EDIT : Just to...
Hello,
I've got a problem with noise in my photodiode transimpedance amplifier circuit. I've looked around on this forum and on the web but couldn't find something useful so here I go...
I need to detect a moving ball passing through a collimated IR laser beam. My photodiode circuit should...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
