Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, [EMAIL PROTECTED] writes: > > >> Coarsedac changes are an issue as you mentioned, but one can get around >> them >> by scaling the two dacs in a way to only use a couple of bits from the >> coarsedac, and operate most of the time using just the fine dac. >> > > If you are controlling this with a microcontroller, there is an alternative > you should consider: > > Use only a single DAC and then PWM modulate its output, followed > by a low-pass filter. > > The trouble with this approach is the very long filter time constants with 24 bit PWM. Combining 2 16 bit PWM outputs requires relatively close tolerance components. A synchronous filter is far more effective.
Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
