Analog Circuit Design
2003, Analog Circuit Design
https://doi.org/10.1007/B105729…
10 pages
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Abstract
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The book 'Analog Circuit Design' compiles contributions from the 17th Advances in Analog Circuit Design workshop, showcasing advancements in three main areas: high-speed clock and data recovery, high-performance amplifiers, and power management. Organized by experts from the University of Pavia, this volume serves as a reference for analog and mixed signal design professionals, emphasizing the collaborative efforts of leading designers in the field.
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DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
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Eight decades ago, Armstrong invented the hyterodyne radio receiver architecture which was agreat success that almost aH high performance wireless recei vers reported in the literature have adopted this architecture. Today, cellular communication systems are required to provide voice, data, video and audio communication services. Two key requirements for the design of a mobile terminal in such a system are low cost and low power consumption. The cost is widely concerned as the most important factor in today's very competitive environment. On the other hand, low power consumption is mandatory to prevent the shortening of battery life time while the amount of information to be proces sed by the terminal is steadily increasing. Many people believe that by integrating as many circuit components as possible in a CMOS technology can help to reduce the cost and power consumption, and at the same time, reduce the size of the receiver. Hyterodyne architectures are not suitable for high level of integration, because they need many off-chip image rejection filters and channel selection filters. Recently, receiver architectures that are more suitable for high level of integration, such as the image rejection, low IF and direct conversion, have attracted much attention from many design engineers and researchers. AU these architectures that apply image cancellation methods rather than off-chip image rejection filters encounter a fundamental problem of limited image rejection performance caused by analogue circuit imperfection such as the gain and phase imhalance hetween the in-phase (1) and quadrature (Q) paths of the receiver. This problem becomes more prominent if the receiver is of wideband. This limited image rejection is a big obstacle to achieve single chip integration of the recei ver. This book focuses on the image rejection problem and its solutions in various receiver architectures. Basically, the non-filtering methods for improving image rejection can be divided into two broad types. The first type of methods provides more accurate analog circuits that have less impact on the 1 and 11 Q imbalance. The second type of methods corrects or calibrates the I and Q imbalance by tuning or digital signal processing. Apart from conventional methods, several new methods have been presented in this book. The new methods of the first type includes the switched-capacitor Hilbert transformers for accurate quadrature signal generation in a wide bandwidth and high performance sampling circuits that can also perform quadrature signal generation. The new methods of the second type includes the wideband digital IjQ imbalance calibration method and the adaptive IjQ imbalan ce correction method. These calibration or correction methods have taken the frequency dependence of the IjQ imbalance, which must be considered in a wideband receiver, into account. Some design examples have been included to demonstrate the proposed methods. This book is mainly based on the materials of my PhD thesis which was supervised by Prof. Franca and co-supervised by Prof. Azeredo-Leme. The research work presented in this book was supported by the Foundation of Science and Technology of the Ministry of Science and Technology of Portugal and the European Commission ESPRIT project PAPRICA. I would like to take this opportunity to thank my former colleagues in the Integrated Circuits and Systems Group,
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This paper is not intended to cover CMOS analog circuit design exhaustively. Yet, it describes how much CMOS technology has been involved in analog circuit design despite the general opinion that CMOS is only suited for digital design. After some developments in the CMOS technology have been discussed, the analog building block scene is covered. The analog building blocks can roughly be divided into two subgroups: the switched-capacitor and the non-switched-capacitor building blocks. Following this subdivision different approaches are briefly looked at. Several tables conclude this review and indicate that new analog developments in CMOS circuit design are still to be expected. Next, the CAD tool development for analog CMOS is discussed, showing that there is still a lot to be done in the field of automated analog design. In conclusion, some ideas concerning analog CAD or, concerning CAD in a more general sense are described.
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