Design and Analysis of Low-Power High-Frequency Robust Sub-Harmonic Injection-Locked Clock Multipliers

A low-jitter, low-power LC-based injection-locked clock multiplier (ILCM) with a digital frequency-tracking loop (FTL) is presented. Based on a pulse gating technique, the proposed FTL continuously tunes the oscillator's free-running frequency to ensure robust operation across PVT variations. The FTL resolves the race condition existing in injection-locked PLLs by decoupling frequency tuning from ...