Open AccessDivide-by-Three Injection-Locked Frequency Dividers with Direct Forcing Signal
Author(s) -
A. Buonomo,
Alessandro Lo Schiavo
Publication year - 2013
Publication title -
journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 25
eISSN - 2090-0155
pISSN - 2090-0147
DOI - 10.1155/2013/145314
Subject(s) - spice , forcing (mathematics) , signal (programming language) , control theory (sociology) , amplitude , oscillation (cell signaling) , mixing (physics) , voltage , frequency divider , phase (matter) , process (computing) , cmos , electronic engineering , synchronization (alternating current) , phase locked loop , computer science , physics , engineering , mathematics , topology (electrical circuits) , electrical engineering , mathematical analysis , phase noise , chemistry , biochemistry , control (management) , quantum mechanics , artificial intelligence , programming language , operating system
Divide-by-three frequency dividers with direct forcing signal are analyzed, and the actual locking mechanism underlying their operation is highlighted. In particular, it is shown that the locking mechanism cannot be explained with the mixing between signals, as commonly made in the literature. An analytical procedure based on the averaging method is developed for solving the equation describing such dividers, and the first approximation to the oscillation in the locked states is predicted. The amplitude and phase of the output voltage in steady state as well as the locking range are derived in terms of the circuit parameters, obtaining useful design guidelines. The derived results are shown to be very close to SPICE simulations for a 0.13 um RF-CMOS process
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