TY - JOUR
T1 - 5-GHz low phase-noise CMOS VCO integrated with a micromachined switchable differential inductor
AU - Huang, Tzuen Hsi
AU - Hsueh, Jay Jen
N1 - Funding Information:
Manuscript received October 9, 2007; revised February 5, 2008. This work was supported in part by the National Science Council of Taiwan, R.O.C. under NSC Grant 95-2221-E-006-083 and by the Chip Implementation Center (CIC), Taiwan.
PY - 2008/5
Y1 - 2008/5
N2 - A 5-GHz CMOS voltage-controlled oscillator (VCO) integrated with a micromachined switchable differential inductor is reported in a 0.18 μm radio frequency-CMOS-based microelectromechanical system technology. The power consumption of the core is about 8 mW at the supply voltage of 1.8 V. A total tuning range of 470 MHz (from 5.13 GHz to 5.60 GHz) is achieved as the tuning voltage ranging from 0 V to 1.8 V. In the practical tuning range, the measured phase noise performances at 1 MHz offset are less than -125 dBc/Hz and -126 dBc/Hz when the inductor switch is turned on and off, respectively. The figure-of-merit is better than -190 dB. When compared with a contrast VCO circuit that utilizes a standard switchable differential inductor, this oscillator reaches a phase noise improvement of around 3 dB as the switch is turned on. Around 1-dB onoff phase noise difference can be achievable.
AB - A 5-GHz CMOS voltage-controlled oscillator (VCO) integrated with a micromachined switchable differential inductor is reported in a 0.18 μm radio frequency-CMOS-based microelectromechanical system technology. The power consumption of the core is about 8 mW at the supply voltage of 1.8 V. A total tuning range of 470 MHz (from 5.13 GHz to 5.60 GHz) is achieved as the tuning voltage ranging from 0 V to 1.8 V. In the practical tuning range, the measured phase noise performances at 1 MHz offset are less than -125 dBc/Hz and -126 dBc/Hz when the inductor switch is turned on and off, respectively. The figure-of-merit is better than -190 dB. When compared with a contrast VCO circuit that utilizes a standard switchable differential inductor, this oscillator reaches a phase noise improvement of around 3 dB as the switch is turned on. Around 1-dB onoff phase noise difference can be achievable.
UR - http://www.scopus.com/inward/record.url?scp=44049101896&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44049101896&partnerID=8YFLogxK
U2 - 10.1109/LMWC.2008.922125
DO - 10.1109/LMWC.2008.922125
M3 - Article
AN - SCOPUS:44049101896
SN - 1531-1309
VL - 18
SP - 338
EP - 340
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 5
M1 - 4497810
ER -