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From: john larkin <JL@gct.com>
Newsgroups: sci.electronics.design
Subject: Re: About TIAs
Date: Fri, 27 Dec 2024 11:01:33 -0800
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On Fri, 27 Dec 2024 18:16:44 +0000, Cursitor Doom <cd@notformail.com>
wrote:

>On Fri, 27 Dec 2024 08:12:23 -0800, john larkin <JL@gct.com> wrote:
>
>>On Fri, 27 Dec 2024 13:45:15 GMT, Jan Panteltje <alien@comet.invalid>
>>wrote:
>>
>>> https://www.electronicdesign.com/technologies/analog/article/55250719/phlux-technology-tailoring-the-design-of-transimpedance-amplifiers-to-infrared-sensor-apps-part-2
>>>
>>>I just drive the photo diode directly into the base of an NPN ..... 
>>> (ducks).
>>
>>I just drive it into the emitter of an NPN. That's my Tough TIA
>>circuit.
>
>John, ISTR we made a deal about not feeding the trolls?

His post was reasonable and on-topic, and he didn't insult anyone, and
TIAs are interesting.

Transistor betas are all over the place, but alphas are very
predictable.