Multiplying with 11 using PIC

[eltra11]

Hi Ioannis, Hi Charlie
Thank you for your kind support.
But CD4066 have to switch the new value capacitor or R1 every 5 minutes, as the input frequency to PLL will change every 5 minutes.
Means, the new frequency come to PLL input, PIC have to detect in which frequency range is the input frequency and according to that, over CD4066 to switch ON or OFF the right elements C and R1 in PLL.
So CD4066 will be switched every 5 minutes, remains in switched state also 5 minutes until the new frequency come on PLL input.
Thank you, will inform you about test results.
Mike

[HenrikOlsson]

The Si5351 looks cool and perhaps I'm missing something but banner specs for it says that the lowest frequency is 2.5kHz while requirements are 11Hz. You would need an extra output divider of 227:1 to get down to 11Hz but then your top frequency doesn't come close to the requirement of 11MHz. And we still don't know the expected resolution of the output frequency. 0.1Hz, 100Hz, 10kHz?

[Ioannis]

In any case, 4046 will not operate at 11MHz.

A DDS is much better idea.

Ioannis