Scalable Inter-Core-Shaping Multi-Core Oscillator With Canceled Common-Mode Dest

Abstract

In this article, a scalable inter-core-shaping multi- core oscillator is proposed to achieve low phase noise and high figure of merit (FoM) at millimeter-wave (mm-wave) band. Adjacent NMOS and PMOS cores generate common-mode (CM) resonance simultaneously, but with opposite signs; thus, differ- ential capacitors can be used to create resonance at twice the oscillation frequency. Such a CM resonance limits flicker noise upconversion and reduces phase noise. The capacitors in differ- ential mode (D