I am in the trying to design a sine wave generator. This generator should be able to sweep through a range of frequencies and the range would be 150 KHz to 80 MHz. the sweep rate is not more than 1.5*10^-3 decades/s.
There are different oscillator topoplogies, but I can't use, say a purely RC oscillator or a crystal oscillator as they offer a static method of generation (single frequency).
As I want a more dynamic design, I think I would need a varactor diode or a FET transistor in its resistive region, but as this is a new area for me, I don't know if the ranges of the mentioned devices would be sufficient. Or alternatively a simple potentiometer which one can manually rotate and change the output frequency, as the design is not focused on either automatic or manual change of frequencies.
I was hoping a more experienced individual could direct me towards the right topology to look at.
Any help is highly appreciated.