Open AccessLocking range enhancement of divide‐by‐two injection locked frequency divider using phase shift technique
Author(s) -
Mokhtabad Saman,
Ghonoodi Hojat
Publication year - 2017
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2016.0394
Subject(s) - frequency divider , cmos , phase shift module , materials science , electrical engineering , injection locking , optoelectronics , phase (matter) , power (physics) , voltage , lc circuit , engineering , physics , optics , insertion loss , capacitor , quantum mechanics , laser
This study presents the new locking range enhancement technique in divide‐by‐two injection locked frequency divider using a phase shifter circuit. The proposed divide‐by‐two phase shifter injection locking frequency divider (ILFD) is based on complementary metal–oxide–semiconductor (CMOS) cross‐coupled oscillator with dual‐resonance fourth‐order LC‐tank that is designed and simulated in 0.18 μm Taiwan Semiconductor Manufacturing Company (TSMC) CMOS technology. Using a phase shifter branch, an extra current with a new phase angle towards oscillator current will inject into the LC tank and moves the locking angle to a new and wider angle that leads to a wide locking range. In an analysis, the effect of the phase shifter circuit on the proposed ILFD has been explained. Simulation results show that at a supply voltage of 0.95 V, the phase shift ILFD consumes 7.32 mW power and at the incident signal power of 0 dBm the locking range is 5.25 GHz, from 4.3 to 9.55 GHz and the relative locking range is 75.81%.