Thanks, LvW. Maybe some memories about part number from LTC could be helpful.
I understand, that it is an active low-pass filter.
Couple years ago friends give me high-voltage power supply unit from old optical system (laser source from 1980s). There was voltage multiplier (near 20kV) and stabilizer, and filter, that was build under this scheme (little more complicate in fact) to reduce the high-voltage amplitude ripple. I did not understand the principle of operation, but noted the possibility of such implication of amplifier. Yesterday this scheme appear in local forum. Some professor in university gave it to student as a research project.
But I can’t find any literature references on this: many “collections of OpAmp shemes”, textbooks, etc. Now I plan to use this scheme in the new project to reduce total capacity.
But I do not want to rely only on results of the computer simulations.
Are there any references to «analog geniuses of the past» publications?