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I am working on a private project where I need to detect a blue light flashing up. But the OpAmp I am using is always on HIGH regardless of the brightness of the blue light. I have also tried various OpAmp circuits but they all resulted in the same. I've tried feedback resistors of up...
I want to know where I can find a SPICE model for this phtodiode regular InGaAs photodiode IG17 here is datasheet https://www.lasercomponents.com/de/?embedded=1&file=fileadmin/user_upload/home/Datasheets/lc-ingaas/ig17-series.pdf&no_cache=1 .
Thank you for understanding,
I am trying to build transconductance amplifier circuit to obtain values of the reverse biased photodiode (PD) current in order to estimate some of the LED characteristics.
At first, I have used the scheme named “Recommended Zero Biased Circuit” from page...
The photodetector is to be used to detect green light from an optical fiber (emitted by fluorecein, about 500nm). I have tried using this detector, but with no readings. This diode has a response of about 0.25 A/W at 500nm.
This is the amplifier I have used (OPA27GP):
Is there a better...