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Wide‐locking range divide‐by‐4 injection‐locked frequency dividers
Author(s) -
Jang S.L.,
Liu C.C.
Publication year - 2008
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.23933
Subject(s) - colpitts oscillator , voltage controlled oscillator , electrical engineering , frequency divider , cmos , inductor , voltage , microwave , power consumption , engineering , power (physics) , optoelectronics , materials science , electronic engineering , telecommunications , physics , vackář oscillator , quantum mechanics
This article studies two wide‐locking range divide‐by‐4 injection locked frequency dividers (ILFDs) employing tunable active inductor (TAI), which are used to extend the locking range and to reduce die area. The CMOS differential ILFD is based on a TAI‐C tank Colpitts voltage‐controlled oscillator (VCO). The quadrature ILFD uses TAI‐C tanks and cross‐coupled switching pairs, the dynamic threshold MOSFETs (DTMOSs) are used to lower the supply voltage and power consumption. The ILFDs were fabricated in the 0.18‐μm 1P6M CMOS technology. At the supply voltage of 1.8 V, at the incident power of 0 dBm the locking range in the Colpitts ILFD in the divide‐by‐4 mode is about 5.45 GHz, from the incident frequency 3.75 to 9.2 GHz. The core power consumption is 4.93 mW. At the supply voltage of 1.4 V, at the incident power of 0 dBm the locking range in the QILFD in the divide‐by‐4 mode is about 7.41 GHz (103.6%), from the incident frequency 3.45–10.86 GHz. The core power consumption is 7.56 mW. The die area is 0.541 × 0.534 mm 2 . © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3229–3232, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23933