Low-jitter 10 GHz multiphase PLL in 90 nm CMOS

A 10 GHz multiphase phase-locked loop (PLL) implemented in 90 nm bulk CMOS technology is presented that uses a bootstrapped NMOS inverter oscillator to obtain steeper clock edges, which may yield an improved jitter performance. The measured values for the rms and peak-to-peak jitter are better than 1 and 7 ps, respectively. © IEE 2005.