[email protected] said: > So, over the, say, 100 Hz and up range, they're probably pretty good.
I like to think I'm pretty good at reading data sheets, but when it comes to modern A/D chips, I'm not so sure. 20 years ago, the specs were for DC and you hoped it did something sensible at high frequencies. Now the specs for many chips are for AC (typically they show a FFT plot) and you are in trouble if you want to use it for DC. Typical audio A/Ds are oversampling with a low pass filter implemented in DSP. This makes the anti-aliasing filter a lot simpler/cheaper. Has anybody tested modern audio A/Ds at very low frequencies? Is there some simple way I should be thinking about this tangle? Has anybody tried adding a signal, say 1 KHz, and filtering it out? I'm fishing for something along the lines of the old chopper amplifiers - shift things to a mode that is known to work well and then filter out the junk you don't like. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ 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.
