Observations Concerning the Locking Range in a Complementary Differential $LC$ Injection-Locked Frequency Divider—Part II: Design Methodology

An intuitive approach to analyze the behavior of an Injection-Locked Frequency Divider was presented in Part I of this work; that paper provided insight into the locking behavior in the valid design area of the circuit. In this paper, we present a rigorous design methodology which provides a closed form equation showing where the locking range is wider. Theoretical predictions of the locked regions are verified by simulations of the circuit in Spectre RF using 0.35-CMOS technology models.