On Mon, June 13, 2016 9:38 pm, Bruce Griffiths wrote: > If the quantisation noise is random and spread uniformly over the Nyquist > bandwidth (~40MHz??) then the noise floor is about -82dBc/Hz.
How do you spread the quantization noise randomly with a one bit quantizer? I'm mostly familiar with single bit quanitizers in the context of audio range delta-sigma converters where the quantizer is in a feedback loop to move most of the noise to a higher frequency range. That also requires a clock much higher than the minimum nyquist requirement. Maybe I need to see a block diagram of what is being described. Where is the clock for the ECL flip-flop generated? I don't recall seeing a description of what the effective sample rate will be, or the highest clock signal accepted for analysis. > With a high resolution RF ADC internal noise is usually sufficient > (>= 1 lsb)) to ensure this. Can't really dither to >= 1lsb when lsb=msb (single bit quantizer). -- Chris Caudle _______________________________________________ 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.
