Proceedings ArticleDOI
A low power wide band CMOS VCO for multi-standard radios
A. Fard,T. Johnson,D. Aberg +2 more
- pp 79-82
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TLDR
In this paper, a single monolithic wide band VCO for multi-standard radios is presented, and the impact on phase noise and power dissipation is especially addressed, where the analysis is demonstrated and verified in a fully integrated CMOS VCO.Abstract:
The work presents a single monolithic wide band VCO for multi-standard radios Analysis on a differential switched capacitor circuit is performed Its impact on phase noise and power dissipation is especially addressed The analysis is demonstrated and verified in a fully integrated CMOS VCO that consumes 27 mA from a 18 V supply and operates with a wide frequency band from 35-53 GHz The measured phase noise is less than -110 dBc/Hz at 1 MHz offset within the entire tuning rangeread more
Citations
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Journal ArticleDOI
A 5-GHz CMOS Frequency Synthesizer With an Injection-Locked Frequency Divider and Differential Switched Capacitors
Ping-Yuan Deng,Jean-Fu Kiang +1 more
TL;DR: A phase-locked loop (PLL)-based frequency synthesizer at 5 GHz is designed and fabricated in 0.18-mum CMOS technology and the power consumption is significantly reduced by using an injection-locked frequency divider (ILFD) as the first frequencydivider in the PLL feedback loop.
Journal ArticleDOI
Digitally-Controlled Polar Transmitter Using a Watt-Class Current-Mode Class-D CMOS Power Amplifier and Guanella Reverse Balun for Handset Applications
TL;DR: A digitally-controlled polar transmitter with a watt-class CMOS power amplifier is demonstrated, implemented in a 0.15 μm RF CMOS process and WCDMA HPSK modulation was demonstrated using a pulse pattern generator-based measurement bench.
Proceedings ArticleDOI
A 0.98 to 6.6 Hz Tunable Wideband VCO in a 180nm CMOS Technology for Reconfigurable Radio Transceiver
TL;DR: A novel wideband voltage-controlled oscillator for multi-band transceivers that has a core VCO and a tuning-range extension circuit, which consists of switches, a mixer, dividers, and variable gain combiners with a spurious rejection technique is proposed.
Proceedings ArticleDOI
A 1.3-2.8 GHz Wide Range CMOS LC-VCO Using Variable Inductor
TL;DR: In this article, a wide-range tunable CMOS voltage controlled oscillator (VCO) is proposed, which uses an on-chip variable inductor and switched capacitors as variable elements.
Proceedings ArticleDOI
A 9.3MHz to 5.7GHz tunable LC-based VCO using a divide-by-N injection-locked frequency divider
TL;DR: In this article, a wideband voltage-controlled oscillator (VCO) for multi-band transceivers is proposed, which has a core VCO and a tuning-range extension circuit, which consists of an injection-locked frequency divider (ILFD), and flip flop dividers.
References
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Journal ArticleDOI
A general theory of phase noise in electrical oscillators
Ali Hajimiri,Thomas H. Lee +1 more
TL;DR: In this paper, a general model is introduced which is capable of making accurate, quantitative predictions about the phase noise of different types of electrical oscillators by acknowledging the true periodically time-varying nature of all oscillators.
Journal ArticleDOI
A filtering technique to lower LC oscillator phase noise
TL;DR: Based on a physical understanding of phase-noise mechanisms, a passive LC filter was found to lower the phasenoise factor in a differential oscillator to its fundamental minimum in this paper.
Journal ArticleDOI
Concepts and methods in optimization of integrated LC VCOs
Donhee Ham,Ali Hajimiri +1 more
TL;DR: In this article, a design strategy centered around an inductance selection scheme is executed using a practical graphical optimization method to optimize phase noise subject to design constraints such as power dissipation, tank amplitude, tuning range, startup condition, and diameters of spiral inductors.
Proceedings ArticleDOI
Physical processes of phase noise in differential LC oscillators
Jacob Rael,Asad A. Abidi +1 more
TL;DR: In this article, the upconversion of flicker noise into phase noise is traced to mechanisms first identified in the 1930's, but apparently since forgotten, and the results are validated against SpectreRF simulations and measurements on two differential CMOS oscillators tuned by resonators with very different Q's.