Hello everyone!

Why is the resistance Rc equal to Ri // Rf?
The resistance is added to compensate for bias currents in the inverting & non-inverting amplifier.

My first time posting here.
Thank you for your time.

Michiel.

 

Why is the resistance Rc equal to Ri // Rf?

Hi Michiel,
Welcome AAC.
Is the above your question.?
E

 

if so comes . . .
. . . irregulars.1 : https://www.maximintegrated.com/en/app-notes/index.mvp/id/3201 (utilizes ((most likely - a CMOS op Amp)) MAX4091)
. . . about https://wiki.analog.com/university/courses/electronics/text/chapter-3 . . . in more detail → http://web.mit.edu/6.101/www/s2018/handouts/L07.pdf