Have a look on this: http://www.timeok.it/wp/wp-content/uploads/2015/08/10_to_100_mhz_multiplier1.pdf
Luciano timeok On Fri 22/01/16 11:15 , REEVES Paul <[email protected]> wrote: > Why not use something like an HP5254B/C ? They give out 50MHz harmonics up > to the low Ghz region, all filtered by a nice high-Q tuneable cavity. All > to typical HP build quality. > Of course, they have an amount of 'not needed' circuitry and are just a > bit ..... , well, bulky. Good clean output from 10MHz in though. > > Paul G8GJA > > -----Original Message----- > From: time-nuts [[email protected]] On Behalf Of Peter Reilley > Sent: 21 January 2016 15:17 > To: [email protected] > Subject: Re: [time-nuts] low noise multiplication to 100 MHz > > Have you considered synthesizers? I am using an Analog Devices AD9517 > to drive a A/D > converter at 250 MHz. It has many clock outputs that are independently > configurable. > It is intended for low jitter applications. > > Pete. > > On 1/21/2016 9:43 AM, jimlux wrote: > > My tiny 100 MHz low noise OCXOs are unexpectedly delayed at the mfr, > > and I'm looking at alternative schemes. > > One is to get 10 or 20 MHz OCXOs (typically in stock) and multiply > > them up. I've got the Wenzel ap notes on 2diode and using HCMOS (and > > I've used the packaged Wenzel multipliers), and I think I have some > > spare board real estate on another board. > > > > The 2diode multiplier describes using 1n5711 or 1n914, but I was > > wondering if anyone has run this sort of multiplier up to 100 MHz? > > > > What sort of symmetry does the resulting waveform have (yeah, it's > > basically a filtered sinewave, because you're picking a harmonic, but > > I've been surprised before)? > > > > > > > > > > I'm driving an FPGA and a couple of ADCs. The ADCs have differential > > input that is 10kohms with 9pF in parallel offset from ground in the > > usual way (we're using a transformer and appropriate bias resistors). > > Not a 50 ohm load, in any case. And it wants a clock that is high for > > about 47.5% to 52.5% in one mode and much wider (30%-70% in another).. > > I need to check. > > > > The FPGA is less critical noise-wise, and has a AD8138 buffer in any > > case, which can fix a variety of evils. > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1] > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [2] > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [3] > and follow the instructions there. > > > > Links: > ------ > [1] > http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma > ilman/listinfo/time-nuts[2] > http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma > ilman/listinfo/time-nuts[3] > http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma > ilman/listinfo/time-nuts > Message sent via Atmail Open - http://atmail.org/ _______________________________________________ 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.
