[volt-nuts] PWM voltage divider

Andreas Jahn Andreas_-_Jahn at t-online.de
Thu Jan 9 01:01:25 EST 2014

Another cirquit that was not mentioned  up to now is the EDN Cirquit


The advantage is relative low effort and fast settling time. (for a PWM 
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


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
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