A 15/30-GHz dual-band multiphase voltage-controlled oscillator in 0.18-μm CMOS
Journal
IEEE Transactions on Microwave Theory and Techniques
Journal Volume
55
Journal Issue
3
Pages
474-483
Date Issued
2007
Author(s)
Abstract
A multiphase oscillator suitable for 15/30-GHz dual-band applications is presented. In the circuit implementation, the 15-GHz half-quadrature voltage-controlled oscillator (VCO) is realized by a rotary traveling-wave oscillator, while frequency doublers are adopted to generate the quadrature output signals at the 30-GHz frequency band. The proposed circuit is fabricated in a standard 0.18-μm CMOS process with a chip area of 1.1 × 1.0 mm2. Operated at a 2-V supply voltage, the VCO core consumes a dc power of 52 mW. With a frequency tuning range of 250 MHz, the 15-GHz half-quadrature VCO exhibits an output power of -8 dBm and a phase noise of -112 dBc/Hz at 1-MHz offset frequency. The measured power level and phase noise of the 30-GHz quadrature outputs are -16 dBm and -104 dBc/Hz, respectively. © 2007 IEEE.
Subjects
Coplanar striplines (CPSs); Frequency doublers; Half-quadrature output phases; Rotary traveling-wave oscillators
Other Subjects
Coplanar striplines (CPS); Multiphase oscillators; Offset frequency; Rotary traveling wave oscillators; Supply voltage; Bandwidth; CMOS integrated circuits; Electric potential; Frequency bands; Frequency doublers; Phase noise; Variable frequency oscillators
Type
journal article