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A Clapp LC‐tank injection locked frequency divider
Author(s) -
Jang ShengLyang,
Wu Y.J.,
Lee ChienFeng,
Juang M.H.
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.22819
Subject(s) - frequency divider , nmos logic , inductor , electrical engineering , cmos , colpitts oscillator , capacitor , microwave , voltage divider , voltage , engineering , materials science , lc circuit , chip , voltage controlled oscillator , optoelectronics , electronic engineering , transistor , telecommunications , vackář oscillator
The design of a frequency divider (FD) employing 3‐dimensional (3D) inductors fabricated in the 0.18‐μm 1P6M CMOS technology is reported. The FD consists of two single‐ended complementary Colpitts oscillators coupled with capacitors to generate differential output signals. The aim of using 3D inductor is to reduce chip size. The divide‐by‐2 LC‐tank injection locked FD is performed by adding an injection nMOS between the differential outputs of the divider. The measurement results show that at the supply voltage of 1.6 V, the divider free‐running frequency is tunable from 3.05 to 3.52 GHz, and at the incident power of 0 dBm the locking range is about 2.9 GHz (43%), from the incident frequency 5.3–8.2 GHz. The core power consumption is 7.14 mW. The die area is 0.625 × 0.672 mm 2 . © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2625–2628, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22819