<@U017W0XFSCX> You can make a 4GHz ring oscillator...
# analog-design
a
@User You can make a 4GHz ring oscillator for a VCO in 130nm using differential amplifiers with balanced loads https://ieeexplore.ieee.org/document/5401347
That one was 4GHz with 4 stage. This 2 stage gets to 9GHz: ieeexplore.ieee.org/abstract/document/5340699/