Title :
Fully integrated CMOS fractional-N frequency divider for wide-band mobile applications with spurs reduction
Author :
Boon, C.C. ; Do, M.A. ; Yeo, K.S. ; Ma, J.-G.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
fDate :
6/1/2005 12:00:00 AM
Abstract :
A spurs reduction fractional-N frequency divider with a frequency range which is 3.5 times larger than that of a conventional fractional-N divider is presented in this paper. A 1.2-GHz quadrature voltage-controlled oscillator (VCO) is designed as the input source of the frequency divider. The circuit was fabricated using the 0.25-μm CMOS technology. The power consumption of the frequency divider and the quadrature VCO are 3 and 6 mW, respectively, at a 2-V supply.
Keywords :
CMOS integrated circuits; broadband networks; frequency dividers; frequency synthesizers; mobile communication; voltage-controlled oscillators; 0.25 micron; 1.2 GHz; 2 V; 3 mW; 6 mW; CMOS technology; frequency divider; frequency synthesizer; power consumption; quadrature voltage-controlled oscillator; spurs reduction; wide-band mobile applications; CMOS technology; Charge pumps; Circuits; Frequency conversion; Frequency synthesizers; Multiaccess communication; Personal communication networks; Phase locked loops; Voltage-controlled oscillators; Wideband; CMOS oscillator; fractional-; quadrature oscillator;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2005.849124
