Journal ArticleDOI
A 1-V 3.8 - 5.7-GHz wide-band VCO with differentially tuned accumulation MOS varactors for common-mode noise rejection in CMOS SOI technology
N. Fong,Jean-Olivier Plouchart,Noah Zamdmer,Duixian Liu,Lawrence F. Wagner,Calvin Plett,N.G. Tarr +6 more
TLDR
In this article, a 1-V 3.8 - 5.7 GHz wideband voltage-controlled oscillator (VCO) in a 0.13/spl mu/m silicon-on-insulator (SOI) CMOS process is presented.Abstract:
In this paper, a 1-V 3.8 - 5.7-GHz wide-band voltage-controlled oscillator (VCO) in a 0.13-/spl mu/m silicon-on-insulator (SOI) CMOS process is presented. This VCO features differentially tuned accumulation MOS varactors that: 1) provide 40% frequency tuning when biased between 0 - 1 V and 2) diminish the adverse effect of high varactor sensitivity through rejection of common-mode noise. This paper shows that, for differential LC VCOs, all low-frequency noise such as flicker noise can be considered to be common-mode noise, and differentially tuned varactors can be used to suppress common-mode noise from being upconverted to the carrier frequency. The noise rejection mechanism is explained, and the technological advantages of SOI over bulk CMOS in this regard is discussed. At 1-MHz offset, the measured phase noise is -121.67 dBc/Hz at 3.8 GHz, and -111.67 dBc/Hz at 5.7 GHz. The power dissipation is between 2.3 - 2.7-mW, depending on the center frequency, and the buffered output power is -9 dBm. Due to the noise rejection, the VCO is able to operate at very low voltage and low power. At a supply voltage of 0.75 V, the VCO only dissipates 0.8 mW at 5.5 GHz.read more
Citations
More filters
Journal ArticleDOI
Wideband Multi-Mode CMOS VCO Design Using Coupled Inductors
Z. Safarian,Hossein Hashemi +1 more
TL;DR: Compared with conventional switched-resonator-based approaches that consume the same chip area, the proposed coupled-inductor-based resonator results in larger quality-factor, and hence, lower oscillator phase noise, in the proposed multi-mode oscillator that uses the multi-port coupled inductors.
Journal ArticleDOI
A 4.39–5.26 GHz LC-Tank CMOS Voltage-Controlled Oscillator With Small VCO-Gain Variation
TL;DR: In this article, a wide band CMOS LC-tank voltage controlled oscillator with small VCO gain (KVCO) variation was developed, which can be tuned from 4.39 GHz to 5.26 GHz.
Journal ArticleDOI
An Ultra-Compact Differentially Tuned 6-GHz CMOS LC-VCO With Dynamic Common-Mode Feedback
TL;DR: A fully integrated 0.024 mm2 differentially tuned 6-GHz LC-VCO for 6+Gb/s high-speed serial (HSS) links in 90-nm bulk CMOS is presented and a circuit technique is introduced to dynamically set the common-mode (CM) voltage of the differential varactor control signals equal to the VCO's CM.
Proceedings ArticleDOI
An Ultra Compact Differentially Tuned 6 GHz CMOS LC VCO with Dynamic Common-Mode Feedback
TL;DR: A fully integrated 0.024mm2 differentially tuned 6GHz LC VCO for 6+Gbps high speed serial (HSS) links in a 90nm bulk CMOS is presented, smaller than any LC-VCO reported to date at this frequency.
Journal ArticleDOI
SiGe Radio Frequency ICs for Low-Power Portable Communication
TL;DR: The range and impact of SiGe bipolar and BiCMOS technologies on wireless transceivers for portable telephony and data communications are surveyed and innovations in on-chip passive design and construction currently being pioneered in mixed-signal SiGe technologies are enabling circuits operating deep into millimeter-wave frequency bands.
References
More filters
Journal ArticleDOI
Design issues in CMOS differential LC oscillators
Ali Hajimiri,Thomas H. Lee +1 more
TL;DR: In this article, an analysis of phase noise in differential cross-coupled inductance-capacitance (LC) oscillators is presented, and the effect of tail current and tank power dissipation on the voltage amplitude is shown.
Book
Analog MOS Integrated Circuits for Signal Processing
Roubik Gregorian,Gabor C. Temes +1 more
TL;DR: In this article, the authors present an overview of the non-ideal effects in Switched-Capacitor Circuits, as well as their application in switch-capacitor circuits.
Journal ArticleDOI
Low-power low-phase-noise differentially tuned quadrature VCO design in standard CMOS
TL;DR: A novel fully differential frequency tuning concept is introduced to ease high integration of VCOs with quadrature outputs and leads to a cross-coupled double core LC-VCO as the optimal solution in terms of power consumption.
Journal ArticleDOI
On the use of MOS varactors in RF VCOs
Pietro Andreani,Sven Mattisson +1 more
TL;DR: In this paper, two 1.8 GHz CMOS voltage-controlled oscillators (VCOs), tuned by an inversion-mode MOS varactor and an accumulation-mode VOC, were implemented in a standard 0.6 /spl mu/m CMOS process.