Title :
A 25-GHz differential LC-VCO in 90-nm CMOS
Author :
Törmänen, Markus ; Sjöland, Henrik
Author_Institution :
Dept. of Electr. & Inf. Technol., Lund Univ., Lund
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
A 25 GHz 90-nm CMOS differential voltage controlled oscillator is presented. Filtering is used at the common source node of the cross-coupled transistors to lower the phase noise. The frequency tuning is accomplished by a continuously tuned accumulation-mode MOS varactor. The oscillator measures a frequency tuning range of 8.7%, and a worst case phase noise over the tuning range of -106 dBc/Hz at 1 MHz offset, with a 1.1 V supply and a power consumption of 6.6 mW. The phase noise figure of merit, FOM, is between 185 dB and 187 dB over the tuning range.
Keywords :
CMOS integrated circuits; MMIC oscillators; circuit tuning; phase noise; varactors; voltage-controlled oscillators; CMOS differential voltage controlled oscillator; MMIC oscillators; MOS varactor; common source node; cross-coupled transistors; frequency 25 GHz; frequency tuning range; noise figure 185 dB to 187 dB; phase noise; power 6.6 mW; size 90 nm; voltage 1.1 V; Filtering; Frequency measurement; Noise measurement; Phase measurement; Phase noise; Power measurement; Power supplies; Tuning; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746083
