On Fri, 23 Feb 2018 17:14:28 -0000 "David C. Partridge" <david.partri...@perdrix.co.uk> wrote:
> The April 1989 HP Journal is mostly dedicated to the 3458A and there's an > article about the dual slope integrator starting on page 8. > > There's also a nice discussion about it in Art of Electronics 3rd Edition > starting on page 918 The HP journal does only mentions a single opamp integrator. The Art of electronics only deals with the close relative used in the HP 34420, which is similar, but not the same. It uses a two opamp structure, which TAoE3 explains to be to increase amplification and slewrate. I guess that can be said about the HP3458 as well, but that begs the question why did they chose a 3 opamp structure? And why are U2 and U3 wired up the way they are? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson _______________________________________________ volt-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.