A novel differential Colpitts CMOS oscillator circuit topology

This paper reports a novel differential Colpitts LC oscillator circuit topology designed in 28 nm fully-depleted silicon-on-insulator (FDSOI) CMOS technology. It exploits magnetic coupling between the spirals of the LC tank, in order to enhance the equivalent quality factor (Q). The oscillator circuit topology presented here shows a potential for achieving a high spectral purity at the mm-wave frequency range.