I'm trying to make an upconverter from 65 MHz to UHF band using a mixer; I therefore need an oscillator frequency around 375 MHz to mix with the 65 MHz base signal. I'm also trying to vary the oscillator frequency such that I can vary the upconversion from a final frequency of 420 MHz to around 450 MHz.
I found an I2C controlled oscillator that varies from 2.3 - 170 MHz that I'm hoping to use.
My intention is to NAND the oscillator with itself, producing a square wave of the same frequency, and then filter out the third harmonic to produce 3x the base frequency. Little has been chosen in the way of specific NAND gate IC or filter passives, but I wanted to see if anyone foresaw drawbacks or difficulties with this setup. Basic notion is below.