Saturday, May 8, 2010

a low phase noise crystal oscillator BFO

I developed a crystal oscillator based on Rhode's low-phase noise
reference oscillator from his 1997 book on PLL synthesizer design.
In this i used a new low-noise NPN transistor, with an NF=1 dB.

Oscillator signal chain includes: oscillator circuit -> mmic
amplifiers -> LPF -> RF out at 10 dBm.

Photos (from top down):
1. inside of the oscillator
2. outside of oscillator
3. oscillator connected to SSB radio signal chain. works great!