Hi If your intention is to run a mixer with saturated inputs …. just run an X-OR gate. It will handle the high level signals much better than an over-driven analog part.
Yes *somebody* should check out a board built that way …. I’ll let you know when I do. Bob > On Jan 7, 2016, at 7:35 AM, Attila Kinali <att...@kinali.ch> wrote: > > On Wed, 6 Jan 2016 18:30:07 -0800 > "Richard (Rick) Karlquist" <rich...@karlquist.com> wrote: > >> Read Gilbert's paper or Gray and Meyers analog IC textbook and >> you will see that the whole theory of operation of these >> depends on keeping the signal levels in them very small, >> especially if linearity (actually translinearity) is >> important. They always have current sources in the >> emitters that contribute a lot of noise. So you have >> small signals and large noise. The IC's that are >> designed to be DC coupled have even more sources of >> extra noise. > > How about using the Gilbert Cell as "digital" mixer, > ie driving the currents hard from one branch to the other > and replacing the current sources by resistors? > > How much would that improve the noise? Would it be still much > worse than the diode mixer? > > 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 > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.