I am looking for a chip to generate a 10.5 GHz to 11.5 GHz tunable sinusoid as a clock signal for our optical modulator, and step is 1 MHz. But I am not quite familiar with this, what do you guys recommend? Thanks!
You can increase the tuning range of the loop beyond Vp, the charge pump power supply, by using an active loop filter.
Here is a similar circuit which demonstrates the use of an active filter: http://www.analog.com/en/circuits-from-the-lab/CN0174/vc.html
We have just announced a family of microwave VCOs (ADF55xx family) which operate over the following ranges
Used with our ADF4108 Integer-N PLL or ADF4159 Fractional-N PLL you can create a tunable sinusoid clock signal.
The bad thing is, however, I don't think your new VCO cover my frequency, nor your ADF 4159 is available.
Also, would your ADF4108 the integer_N PPL provide a smaller step, namely, 1 MHz, than the reference clock, mainly, 10 MHz for the high frequency range as 10 GHz. Thank you again.
use adf4350 and generate 2625-2875MHz sine with 250kHz tuning steps. then multiply that by 4 with a diode multiplier or use another multiplier IC.
ADF4108 will provide smaller step than REF, i.e. 1MHz as you need.
Thanks, that's cool, and do you have any recommendations for the frequency multiplexer?
Btw, I was trying to use ADF4158, but I cannot find an appropriate VCO to generate my frequency, as the ADF4158's Vp, the charge pump power supple is limited to 5.5V. Do you have any suggestions?
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