A Sub-100 fs-Jitter 816-GHz Ring-Oscillator-Based Power-Gating Injection-Locked

Abstract

This work presents an ultralow-jitter ring-oscillator (RO)-based injection-locked clock multiplier (ILCM). Using the power-gating (PG) injection method that can completely remove the accumulated phase error of the RO, the proposed ILCM can achieve a very wide injection bandwidth, and, thus, an ultralow- jitter, even when the multiplication factor, N,i si n c r e a s e d above 60. To overcome the natural limitation of the PG injection, two digitally controlled oscillators (DCOs) were used to oper