Hi!
I've been trying for a while to construct a circuit to convert and amplify the current generated by a photodiode with the output as a voltage which ranges from 0-3.3V.
My original mistake was in terms of op-amp selection, as I had picked a model whose supply voltage was too high.
Having now got hold of a low-voltage op-amp, I realise that the configuration of my circuit is also a problem. I cant seem to find any consistent/doable schematics for a Transimpedance Amplifier online, and I was wondering whether any of you could offer any expertise to improve my circuit (which I realize is simplistic/wrong, better to add things than take away)
A summary of the circuit's intended operation:
The tiny current generated by the photodiode (http://docs-europe.electrocomponents.com/webdocs/08b2/0900766b808b25c6.pdf) is converted to a voltage by an LM358 where the "dark voltage" is around 0V and the "light voltage" is around 3.3V. The supply voltage can be 5V or 3.3V.
Thanks!
I've been trying for a while to construct a circuit to convert and amplify the current generated by a photodiode with the output as a voltage which ranges from 0-3.3V.
My original mistake was in terms of op-amp selection, as I had picked a model whose supply voltage was too high.
Having now got hold of a low-voltage op-amp, I realise that the configuration of my circuit is also a problem. I cant seem to find any consistent/doable schematics for a Transimpedance Amplifier online, and I was wondering whether any of you could offer any expertise to improve my circuit (which I realize is simplistic/wrong, better to add things than take away)
A summary of the circuit's intended operation:
The tiny current generated by the photodiode (http://docs-europe.electrocomponents.com/webdocs/08b2/0900766b808b25c6.pdf) is converted to a voltage by an LM358 where the "dark voltage" is around 0V and the "light voltage" is around 3.3V. The supply voltage can be 5V or 3.3V.
Thanks!
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