Premium
Wide locking range divide‐by‐4 injection locked frequency dividers
Author(s) -
Lee Shaohua,
Jang ShengLyang,
Lee ChienFeng,
Juang MiinHorng
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22481
Subject(s) - frequency divider , resonator , inductor , electrical engineering , wideband , cmos , microwave , engineering , voltage , injection locking , power (physics) , voltage controlled oscillator , electronic engineering , optoelectronics , materials science , telecommunications , physics , optics , laser , quantum mechanics
This article proposes techniques for improving locking range of divide‐by‐4 injection locked frequency divider (D4ILFD). Two D4ILFDs were designed and implemented. One D4ILFD is made of tapped resonator; the other ILFD is made of switched resonator. Both circuits use a complementary CMOS LC‐tank oscillator and are based on the direct injection topology. The wideband function of switched resonator D4ILFD is obtained by tuning the switch across the tank inductors and the varactors. At the supply voltage of 1.8 V and at the incident power of 0 dBm, the locking range of switched resonator D4ILFD is from 7.11 to 9.4 GHz. At the supply voltage of 1.2 V and at the incident power of 0 dBm, the locking range of the tapped inductor D4ILDS is from 7.39 to 9.44 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1533–1536, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22481