Hi blueskull,
Thank you for the info.
The patent that I was reading Patent No.: US 8,024.888 B2 said that the 3DU11 had an integrated preamp which looks to be a red herring.
"the IR receiver is preferably embodied as an IR photo transistor such as a 3DU11 pin diode with preamp"
I would love to know how you found the data on it, because I tried really hard to find it and I need a few pointers for next time.
Bob