Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
All you have to work with is the Cmax-Cmin range of the varactor,
as a fraction of total node C. Scaling varactor up and inductor
down, and minimizing size of anything connected to the tank,
is about all you have for "knobs".
I would like to make tuning range 2.5to5GHz and I wonder if a capacitor bank will work or not ..Also I have a question about signals on switches.. should they be something like different clocks ? like bit0->clk, bit1->clk/2 etc (clk signal from a vpulse)