Title :
A 2.5-GHz 860μW charge-recycling fractional-N frequency synthesizer in 130nm CMOS
Author :
Park, Dongmin ; Lee, Woojae ; Jeon, Sehyung ; Cho, SeongHwan
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejeon
Abstract :
A 1.2 V 2.5 GHz 860 muW fractional-N synthesizer is implemented in 130 nm CMOS. It employs charge recycling technique for implicit DC-DC conversion without using any voltage regulators, and achieves -77dBc/Hz and -113.5 dBc/Hz of phase noise at 100 kHz and 1MHz offset, respectively. Self-biased divider and VCO enables robust operation of the proposed circuit.
Keywords :
CMOS integrated circuits; DC-DC power convertors; dividing circuits; frequency synthesizers; phase noise; voltage-controlled oscillators; CMOS integrated circuits; DC-DC conversion; VCO; charge recycling technique; fractional-N synthesizer; frequency 2.5 GHz; frequency synthesizer; phase noise; power 860 muW; self-biased divider; size 130 nm; voltage 1.2 V; Circuits; Energy consumption; Frequency synthesizers; Noise robustness; Phase locked loops; Phase noise; Recycling; Regulators; Voltage; Voltage-controlled oscillators; PLL; charge recycling; fractional; frequency synthesizer; low power;
Conference_Titel :
VLSI Circuits, 2008 IEEE Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-1804-6
Electronic_ISBN :
978-1-4244-1805-3
DOI :
10.1109/VLSIC.2008.4585963
