----- Original Message ----- From: "Dr Bruce Griffiths" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Friday, March 02, 2007 6:10 PM Subject: Re: [time-nuts] External clock for Analog to Digital Converter in GPS Rx front-end
> Bilal Amin wrote: >> Hi Everyone, >> >> I am working on Jitter in Analog to Digital Converters(ADCs) for GPS >> receiver front-end. I am trying to setup an experiment to see the effects >> of jitter in real time ADCs. I have an ADC evaluation board with external >> clock input for sampling (i.e Sampling clock). Now I want to produce a >> self created jittery signal to see the effects of jitter in ADC. Can >> anyone out there have any idea(s) how I can produce a real time clock >> signal with "variable jitter" for the input of external clock? Producing >> a simple clock signal (i.e. without jitter) is straight forward with the >> help of any signal generator but a clock signal with "variable jitter" is >> a problem. >> >> Thanks for your help. >> >> Cheers >> >> Bilal >> _______________________________________________ >> time-nuts mailing list >> time-nuts@febo.com >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >> > Bilal > > All you have to do is add sufficient noise to a sinewave clock. > The clock shaping circuitry will then convert the noise to timing jitter > at the zero crossings. > All you need is a suitable source of wideband noise. > > Bruce > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > Hi Bruce, Thanks for your email.Adding noise to a sine wave is not that straight forward I guess. Do you think a comparator works for this? _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts