Re: About TIAs

Jeroen Belleman <jeroen@nospam.please> wrote:

On 12/27/24 21:14, Phil Hobbs wrote:

Jeroen Belleman <jeroen@nospam.please> wrote:

On 12/27/24 19:16, Cursitor Doom 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?

 
Troll? I think he sparked an interesting discussion. The TIA
amplifiers you typically see in application notes are very poor.
It's good to show people here that there are ways to do much
better.
 
Jeroen Belleman
 

 
An oldie but goodie from your humble servant:
“photodiode front ends: the real story”
https://electrooptical.net/static/oldsite/www/frontends/frontends.pdf
 
Cheers
 
Phil Hobbs
 

 
Yes, that one made me take notice.
 
Jeroen Belleman
 
 

For my third edition, I tried reproducing it with modern op amps, but they
all had way too much input capacitance. I had to use a different circuit.

Cheers

Phil Hobbs
Who wishes he could still get LF357s

--
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics