I just wish the tapr would not discontinue things so fast it seems once you see it mentioned it's discontinued
On Sun, Sep 30, 2018, 1:08 PM Bob kb8tq <kb...@n1k.org> wrote: > Hi > > If (as originally specified) noise and jitter are not a big deal - there > are a lot > of chips out there like the ICS570. They are designed to do weird ratio > frequency > conversions so 10 to 12 or 10 to 16 are trivial for them. The Clockblock > board was > one way to get it all put together. > > Bob > > > On Sep 30, 2018, at 12:05 PM, Gerhard Hoffmann <dk...@arcor.de> wrote: > > > > > > Am 30.09.2018 um 16:49 schrieb Attila Kinali: > > > >> The simplest way I can think of is the following: > >> Use a 74LV8154 to divide the 10MHz down to 152.587890625Hz. > >> Use the capture timer unit of the uC to measure the phase of the > >> pulse. Use any kind of DAC (internal, external, PWM,...) to steer > >> the 16MHz VCO. Depending on how fast the timer unit runs, this > >> will give you something in the order of 10-200ns dead-band. > >> By choosing the right frequency for the timer unit, one can > >> get it to "dither" a bit and then use averaging. > >> > >> For lower jitter, use one half of a Nutt interpolator > >> to get the timing difference between the 152Hz signal > >> and the 16MHz (ie similar to what the SRS FS740 does). > >> Use something akin Nick Sayer's time-to-amplitude converter > >> for the fine measurement. > >> > >> Same works equally well for 12MHz. > >> > >> > > > > Wow. That's truly a Rube Goldberg design. > > > > There is a simpler way. IDT ICS570. Digikey 800-1073-5-ND > > > > Solder time less than 10 minutes. > > I had the 3V3-Version in the parts drawers, officially it takes the 5V > > version to generate the 160 MHz, but the 3V3 version happened to work, > too. > > The difference between 120 and 160 MHz is just a GND wire on pin 6 (vs. > open) > > > > Divide by 10 is left as an exercise. > > > > regards, > > Gerhard > > > > (But then, some like to build and tune multiplier chains and mixers.) > > > > > <Auswahl_008.png><times12.bmp><times16.bmp>_______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.