Hi JR, Look at the MC145170, 185 MHz is the upper limit with 500mV at its input. Not too much easy to speak with it...
Best regards, Gérard/F6EHJ jr_dakota a écrit : >Given the State of the Art, 50Mhz phase detectors are probably >possible fairly easily.... > >Problem is everything commercial is geared for 900Mhz cellphones, >gigahertz broadband wireless, etc and it's not possible at those >frequencies (yet) for 1 on 1 phase comparison. The 50Mhz and under >market is way too small to make anyone want to develop such an IC ... > >JR > >--- In [email protected], "sis108" <[EMAIL PROTECTED]> wrote: > > >>I often wondered why you couldn't use a 1x VCO and phase detctor. >> >>IE DDS 50-60Mhz out VCO 50-60MHZ both phase detectors 50-60mhz in. >>Hopefully the loop filter would kill the spurs. >> >>I have not found high speed phase/freq detectors however. >> >>Anyone have an opinion on how well this might work to kill the spurs? >> >> >>--- In [email protected], KY1K <[EMAIL PROTECTED]> wrote: >> >> >>>Has any amateur ever done a DDS in conjunction with a PLL to clean up >>>spurs? I hear chatter about it working well if the PLL is designed >>>properly, but have never run across any real life examples of the 2 >>>technologies rolled into one. >>> >>>I understand the DDS has advantages, especially in it's ability to >>>change frequency quickly. But, if rapid qsy's are not needed, I would >>>think a PLL with a slow response time in the filter would be as good >>>or better with respect to spectral purity than any DDS available >>> >>> >today. > > >>>Appreciate any pointers to web resources discussing this topic. >>> >>>Thanks, >>> >>> >>>Art >>> >>> >>> > > > > > > > > >Yahoo! Groups Links > > > > > > > >--------------------------------------------------------------------------------------- >Wanadoo vous informe que cet e-mail a ete controle par l'anti-virus mail. >Aucun virus connu a ce jour par nos services n'a ete detecte. > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
