Considerations when using PWM circuits include Ron and Roff resistances,  rise and fall times of switches (differing times cause a bias offset) and charge injection effects (add offset), among others.  I am looking for circuit information for PWM dividers myself.  Does anyone have sources for the Fluke 5440 manual and the Datron 4910 manuals with schematics.  I looked on K04BB's site and Fluke's site  but all I could find were user manuals with no schematics. Randy Evans On Wednesday, January 8, 2014 10:17 PM, Andreas Jahn <Andreas_-_Jahn@t-online.de> wrote: Another cirquit that was not mentioned  up to now is the EDN Cirquit http://edn.com/design/other/4326640/DC-accurate-32-bit-DAC-achieves-32-bit-resolution The advantage is relative low effort and fast settling time. (for a PWM solution) Although you have to tweak the cirquit to get a fair linearity of around 2-3 ppm. (The values in the article seem to be very optimistic to me). Also the noise behaviour of my setup is not as good as would be a dual dac version. With best regards Andreas Am 08.01.2014 09:25, schrieb Jan Fredriksson: > I'm thinking of using a PWM divider for voltage generation of adjustable DC > voltages from a voltage reference. > > Does anyone have any pointers to circuits, solutions, topologies, error > analysis etc. for such solutions? > > Jan > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.