santerror
Newbie level 6
multiple vcos pll
I need to build a freq synthesizer with wide range. 450 MHz to 850MHz. I'm already found some pll's, but the main problem is vco's. Cause, vco with this range, need very large voltage tunning. (aprox 0 to 25v), and the current from pll ic charge pump is very weak, and loop filter can't reach this voltage.
Is there a possibility to use vco' in parallel???
Pleae some suggestion or rf tricks or questions...
I need to build a freq synthesizer with wide range. 450 MHz to 850MHz. I'm already found some pll's, but the main problem is vco's. Cause, vco with this range, need very large voltage tunning. (aprox 0 to 25v), and the current from pll ic charge pump is very weak, and loop filter can't reach this voltage.
Is there a possibility to use vco' in parallel???
Pleae some suggestion or rf tricks or questions...