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• W2177077228 abstract "Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Kim Ostman Name of the doctoral dissertation Integrated Circuits for Linear and Efficient Receivers Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 170/2014 Field of research Electronic circuit design Manuscript submitted 25 August 2014 Date of the defence 5 December 2014 Permission to publish granted (date) 21 October 2014 Language English Monograph Article dissertation (summary + original articles) Abstract This dissertation presents original research contributions in the form of five integrated circuit (IC) implementations and seven scientific publications. They present advances related to high-Q resonators, DC-DC converters, and programmable RF front-ends for integrated wireless receivers. Because these three building blocks have traditionally required implementations that are partly external to the IC, the ultimate target is to reduce system size, cost, and complexity.This dissertation presents original research contributions in the form of five integrated circuit (IC) implementations and seven scientific publications. They present advances related to high-Q resonators, DC-DC converters, and programmable RF front-ends for integrated wireless receivers. Because these three building blocks have traditionally required implementations that are partly external to the IC, the ultimate target is to reduce system size, cost, and complexity. Wireless receivers utilize high-Q resonators for accurate frequency synthesis and signal filtering, typically by relying on external quartz resonators and rigid surface acoustic wave filters. The above-IC implementation of bulk acoustic wave (BAW) resonators and the use of programmable on-chip N-path filtering offer interesting integrable alternatives. Accordingly, this dissertation demonstrates a 2.1-GHz voltage controlled oscillator (VCO) in 250-nm SiGe:C BiCMOS, based on an above-IC BAW resonator. Furthermore, N-path filtering is investigated in a 2.5-GHz narrowband RF front-end in 40-nm CMOS. It achieves more than 10 dB of interferer filtering early in the RF chain, and the original analysis details the counter-intuitive behavior of the N-path filter when it is used together with LC-based filters. Receiver power management requires the use of step-down DC-DC converters between the external battery and the integrated receiver circuitry. The related switching regulators are typically based on low-frequency operation, which requires external filtering components. In contrast, this dissertation presents a fully integrated 3.6-to-1.8-V buck converter in 65-nm CMOS that uses switching frequencies of more than 100 MHz. A topology-independent switch bridge optimization approach is also proposed. The measurement results demonstrate the feasibility of integration, although with compromised performance. Finally, the software-defined radio paradigm operates on the premise of radio and RF frontend programmability. This calls for A/D conversion as close to the antenna interface as possible. This dissertation presents original work on a 40-nm CMOS direct delta-sigma receiver (DDSR) for the 0.7-to-2.7-GHz frequency range. Particular emphasis is put on developing new methods for DDSR RF front-end modeling and design." @default.
• W2177077228 created "2016-06-24" @default.
• W2177077228 creator A5073492507 @default.
• W2177077228 date "2014-01-01" @default.
• W2177077228 modified "2023-09-27" @default.
• W2177077228 title "Integrated Circuits for Linear and Efficient Receivers" @default.
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