Bob Paddock wrote: >> These devices are a little noisy below 100Hz. >> > > Rather than constantly battle the "there is to much noise", what are > your thoughts on deliberately injecting out-of-band noise? > > As an example: > http://www.analog.com/UploadedFiles/Application_Notes/319765654AN-410.pdf > "Overcoming Converter Nonlinearities with Dither" > > >> The distortion produced by a diode clamp is immaterial when one is only >> interested in the zero crossing time. >> > > It depends on where the harmonics fall. > > > Bob
What is the application for which you want to use injected out of band noise? Since the performance of a well designed zero-crossing detector is equivalent to a 25 bit ADC when locating the zero-crossing, it will be difficult to replicate this performance using a lower resolution ADC even combined with out of band dithering. In practice, diode clamp circuit distortion in a zero-crossing detector isn't an issue. 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.
