Title :
A 1.7-GHz wide-band CMOS LC-VCO with 7-Bit coarse control
Author :
Sanchez-Azqueta, C. ; Aguirre, J. ; Gimeno, C. ; Aldea, C. ; Celma, S.
Author_Institution :
Group of Electron. Design (GDE), Univ. de Zaragoza, Zaragoza, Spain
Abstract :
This paper presents an LC-tank-based voltage-controlled oscillator, fabricated in a standard 0.18 μm CMOS technology, with a 44 % tuning range around a center frequency of 1.7 GHz. To minimize the impact of the proposed oscillator on phase noise in phase-locked-loops, it has a coarse control of 27-1 levels, driven by a 7-bit digital word, achieving a tuning sensitivity below 35 MHz/V along the whole tuning range. The oscillator has -123.4 dBc/Hz phase noise at 1 MHz offset and draws 10 mA from a 1.8 V supply, yielding a total power/tuning/frequency-normalized figure of merit equal to -5.5 dB.
Keywords :
CMOS integrated circuits; UHF oscillators; phase locked loops; phase noise; voltage-controlled oscillators; LC-tank; coarse control; current 10 mA; digital word; frequency 1.7 GHz; phase locked loops; phase noise; size 0.18 mum; voltage 1.8 V; voltage-controlled oscillator; wideband CMOS LC-VCO; word length 7 bit; Arrays; CMOS integrated circuits; Capacitance; Capacitors; Phase noise; Tuning;
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7169333
