I'm using one in that super low cost TIA (with the LM324). It's in parallel with a 200M feedback resistor, to give a logarithmic overrange indication.
Your plot has the transistor in normal bias for the inverted configuration (collector negative), which probably helps the log conformance a fair amount.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Yeah, too many voltage regulators. About 100, of all kinds, including switchers.
Most of those 3e6 parts are resistors and caps on reels.
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