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A Low Power Wide-Band CMOS VCO for Multi-Standard Radios
Mälardalens högskola, Institutionen för datavetenskap och elektronik.
Mälardalens högskola, Institutionen för datavetenskap och elektronik.
Mälardalens högskola, Institutionen för datavetenskap och elektronik.
2004 (engelsk)Inngår i: Proceedings - 2004 IEEE Radio and Wireless Conference, RAWCON, 2004, s. 79-82Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

This paper 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 2.7 mA from a 1.8 V supply and operates with a wide frequency band from 3.5 - 5.3 GHz. The measured phase noise is less than -110 dBc/Hz at 1 MHz offset within the entire tuning range.

sted, utgiver, år, opplag, sider
2004. s. 79-82
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-4233DOI: 10.1109/RAWCON.2004.1389076ISI: 000224588200021Scopus ID: 2-s2.0-14844332709ISBN: 0-7803-8451-2 (tryckt)OAI: oai:DiVA.org:mdh-4233DiVA, id: diva2:121522
Konferanse
2004 IEEE Radio and Wireless Conference, RAWCON; Atlanta, GA; United States; 19 September 2004 through 22 September 2004
Tilgjengelig fra: 2006-01-01 Laget: 2006-01-01 Sist oppdatert: 2016-10-31bibliografisk kontrollert
Inngår i avhandling
1. Analysis and Design of Low-Phase-Noise Integrated Voltage-Controlled Oscillators for Wide-Band RF Front-Ends
Åpne denne publikasjonen i ny fane eller vindu >>Analysis and Design of Low-Phase-Noise Integrated Voltage-Controlled Oscillators for Wide-Band RF Front-Ends
2006 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The explosive development of wireless communication services creates a demand for more flexible and cost-effective communication systems that offer higher data rates. The obvious trend towards small-size and ultra low power systems, in combination with the ever increasing number of applications integrated in a single portable device, tightens the design constraints at hardware and software level. The integration of current mobile systems with the third generation systems exemplifies and emphasizes the need of monolithic multi-band transceivers. A long term goal is a software defined radio, where several communication standards and applications are embedded and reconfigured by software. This motivates the need for highly flexible and reconfigurable analog radio frequency (RF) circuits that can be fully integrated in standard low-cost complementary metal-oxide-semiconductor (CMOS) technologies.

In this thesis, the Voltage-Controlled Oscillator (VCO), one of the main challenging RF circuits within a transceiver, is investigated for today’s and future communication systems. The contributions from this work may be divided into two parts. The first part exploits the possibility and design related issues of wide-band reconfigurable integrated VCOs in CMOS technologies. Aspects such as frequency tuning, power dissipation and phase noise performance are studied and design oriented techniques for wide-band circuit solutions are proposed. For demonstration of these investigations several fully functional wide-band multi-GHz VCOs are implemented and characterized in a 0.18µm CMOS technology.

The second part of the thesis concerns theoretical analysis of phase noise in VCOs. Due to the complex process of conversion from component noise to phase noise, computer aided methods or advanced circuit simulators are usually used for evaluation and prediction of phase noise. As a consequence, the fundamental properties of different noise sources and their impact on phase noise in commonly adopted VCO topologies have so far not been completely described. This in turn makes the optimization process of integrated VCOs a very complex task. To aid the design and to provide a deeper understanding of the phase noise mechanism, a new approach based on a linear time-variant model is proposed in this work. The theory allows for derivation of analytic expressions for phase noise, thereby, providing excellent insight on how to minimize and optimize phase noise in oscillators as a function of circuit related parameters. Moreover, it enables a fair performance comparison of different oscillator topologies in order to ascertain which structure is most suitable depending on the application of interest. The proposed method is verified with very good agreement against both advanced circuit simulations and measurements in CMOS and bipolar technologies. As a final contribution, using the knowledge gained from the theoretical analysis, a fully integrated 0.35µm CMOS VCO with superior phase noise performance and power dissipation is demonstrated.

sted, utgiver, år, opplag, sider
Västerås: Institutionen för Datavetenskap och Elektronik, 2006. s. 166
Serie
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 25
Emneord
Electronic
HSV kategori
Forskningsprogram
Elektronik
Identifikatorer
urn:nbn:se:mdh:diva-88 (URN)91–85485–05-5 (ISBN)
Disputas
2006-01-27, Beta, 14:00
Opponent
Veileder
Tilgjengelig fra: 2006-01-01 Laget: 2006-01-01

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