In message <1225454799-1347767280-cardhu_decombobulator_blackberry.rim.net-1901 834519-@b27.c1.bise6.blackberry>, li...@lazygranch.com writes:
>The PWM DAC should have perfect differential linearity, which I >believe is all that matters in this application. (That and no missing >codes.) Not so when you try to combine two DACs to make one higher >resolution DAC. The main problem with two staggered DAC's is actually that all OCXO's drift and eventually you will have to step the major DAC which will give a glitch in the lower bits, almost no matter how much you calibrate beforehand. The PRS10 uses a staggered DAC internally and the steps on the major DAC are measurable in the output signal. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | 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.
