153 fsRMS-Integrated-Jitter and 114-Multiplication Factor PVT-Robust 22.8 GHz Ring-LC-Hybrid Injection-Locked Clock Multiplier

Abstract

This work presents an ultra-low-jitter hybrid injection-locked clock multiplier (ILCM) that cascades a ring ILCM and an LC ILCM to achieve a high multiplication factor of 114. A dual-purpose frequency calibrator (DPFC) that can calibrate the frequency drifts of the two VCOs, concurrently, consumes only 400 μW. The RMS-jitter of the output signal at 22.8 GHz was 153 fs. Due to the DPFC, RMS-jitter was maintained to be less than 180 fs, across supply voltages and temperatures.