In message <[EMAIL PROTECTED]>, Richard Moore wri tes: >> 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. > >Poul, how do I PWM a DAC that is itself a PWM device? This question >is prompted by the DAC I'm using in Bert Zauhar's FLL GPSDO, which is >a dithered 10-bit DAC in a PIC chip that results in 14-bit >resolution. I'd like to have a simple way to get 2 to 4 extra bits of >resolution out of this. Can you recommend some design resources to do >this?
I would simply cummutate the DAC output with a PWM controlled fet or CMOS switch. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.
