Download or read book Tunable Highly Linear Low Noise Amplifier and N Path Filter Architectures for SAW Less Duplexers in Mobile Radio Transceivers written by Julian Zuber and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wideband Low Noise Amplifiers Exploiting Thermal Noise Cancellation written by Federico Bruccoleri and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Noise Amplifiers (LNAs) are commonly used to amplify signals that are too weak for direct processing for example in radio or cable receivers. Traditionally, low noise amplifiers are implemented via tuned amplifiers, exploiting inductors and capacitors in resonating LC-circuits. This can render very low noise but only in a relatively narrow frequency band close to resonance. There is a clear trend to use more bandwidth for communication, both via cables (e.g. cable TV, internet) and wireless links (e.g. satellite links and Ultra Wideband Band). Hence wideband low-noise amplifier techniques are very much needed. Wideband Low Noise Amplifiers Exploiting Thermal Noise Cancellation explores techniques to realize wideband amplifiers, capable of impedance matching and still achieving a low noise figure well below 3dB. This can be achieved with a new noise cancelling technique as described in this book. By using this technique, the thermal noise of the input transistor of the LNA can be cancelled while the wanted signal is amplified! The book gives a detailed analysis of this technique and presents several new amplifier circuits. This book is directly relevant for IC designers and researchers working on integrated transceivers. Although the focus is on CMOS circuits, the techniques can just as well be applied to other IC technologies, e.g. bipolar and GaAs, and even in discrete component technologies.

Download or read book Advances in N path Filtering for Broadband Tunable and Interference Robust Reception written by Chris Michael Thomas and published by . This book was released on 2015 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research aims at creating broadband tunable, fully integrated filters for the application of cognitive radio and signal classification receivers. The approach under study is the N-path filter technique which is capable of translating a baseband impedance to a reference frequency creating a tunable filter. The traditional N-path filter suffers from fundamental architectural limitations, namely: a trade-off between insertion loss and out-of-band rejection, reference clock feed-through, and jammer power handling limitations. In the first approach, the fundamental trade-off of the traditional N-path filter between insertion loss and out-of-band rejection is improved by a transmission line (T-line) N-path filter technique. The T-line N-path filter ideally absorbs the parasitic capacitance of the N-path filter into a synthetic transmission line, improving insertion loss. Moreover, the out-of-band rejection is improved by further low-pass filtering. A transmission line N-path filter was implemented in a 65 nm CMOS process that achieves a tunable band-pass filter with tunable pass-band range of 0.1-to-1.6 GHz, less than 5 dB insertion loss, 30 dB to 50 dB out-of-band rejection, in-band IIP3 of +29 dBm, and IP1dB out-of-band jammer tolerance of +11 dBm. In the second approach, a pseudorandom clocking scheme for an N-path bandpass filter is presented, which lowers the LO leakage to the filter's input and output. Measurements of a 65 nm CMOS prototype from 100 MHz to 1.4 GHz demonstrate 15 dB out-of-band rejection, P1dB of +0 dBm, in-band IIP3 of +22 dBm, out-of-band jammer tolerance of +11 dBm, and LO leakage improvement of 10 dB to 15 dB with magnitude ranging from -60 dBm to -80 dBm. Lastly, a GaN HEMT bandpass N-path filter is demonstrated for high jammer tolerance. Measurements from 50 MHz to 300 MHz of a series architecture implemented in hybrid form with Cree bare die in 400 nm technology demonstrate a IP1dB of +10 dBm, IIP3 of +24.6 dBm, and a IP1dB out-of-band jammer tolerance of +17 dBm. As an example application for the tunable front-end filter, a signal classification receiver (Cognitive radio Low-energy signal Analysis Senor IC - DARPA CLASIC program) topology is presented. The CLASIC receiver is a multi-antenna receiver that channelizes, separates, and then classifies signals within a band of interest. A key building block of the CLASIC receiver is the baseband channelizer that allows for parallel signal separation in the following stages in the receiver. Measurements were performed on a 1-to-16 BiCMOS channelizer to demonstrate feasibility. Current research avenues and potential future investigations are reviewed in the conclusion.

Download or read book Wideband Low Noise Amplifiers Exploiting Thermal Noise Cancellation written by Federico Bruccoleri and published by Springer. This book was released on 2008-11-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low Noise Amplifiers (LNAs) are commonly used to amplify signals that are too weak for direct processing for example in radio or cable receivers. Traditionally, low noise amplifiers are implemented via tuned amplifiers, exploiting inductors and capacitors in resonating LC-circuits. This can render very low noise but only in a relatively narrow frequency band close to resonance. There is a clear trend to use more bandwidth for communication, both via cables (e.g. cable TV, internet) and wireless links (e.g. satellite links and Ultra Wideband Band). Hence wideband low-noise amplifier techniques are very much needed. Wideband Low Noise Amplifiers Exploiting Thermal Noise Cancellation explores techniques to realize wideband amplifiers, capable of impedance matching and still achieving a low noise figure well below 3dB. This can be achieved with a new noise cancelling technique as described in this book. By using this technique, the thermal noise of the input transistor of the LNA can be cancelled while the wanted signal is amplified! The book gives a detailed analysis of this technique and presents several new amplifier circuits. This book is directly relevant for IC designers and researchers working on integrated transceivers. Although the focus is on CMOS circuits, the techniques can just as well be applied to other IC technologies, e.g. bipolar and GaAs, and even in discrete component technologies.

Download or read book Millimeter Wave Low Noise Amplifiers written by Mladen Božanić and published by Springer. This book was released on 2018-05-23 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first standalone book that combines research into low-noise amplifiers (LNAs) with research into millimeter-wave circuits. In compiling this book, the authors have set two research objectives. The first is to bring together the research context behind millimeter-wave circuit operation and the theory of low-noise amplification. The second is to present new research in this multi-disciplinary field by dividing the common LNA configurations and typical specifications into subsystems, which are then optimized separately to suggest improvements in the current state-of-the-art designs. To achieve the second research objective, the state-of-the-art LNA configurations are discussed and the weaknesses of state-of the art configurations are considered, thus identifying research gaps. Such research gaps, among others, point towards optimization – at a systems and microelectronics level. Optimization topics include the influence of short wavelength, layout and crosstalk on LNA performance. Advanced fabrication technologies used to decrease the parasitics of passive and active devices are also explored, together with packaging technologies such as silicon-on-chip and silicon-on-package, which are proposed as alternatives to traditional IC implementation. This research outcome builds through innovation. Innovative ideas for LNA construction are explored, and alternative design methodologies are deployed, including LNA/antenna co-design or utilization of the electronic design automation in the research flow. The book also offers the authors’ proposal for streamlined automated LNA design flow, which focuses on LNA as a collection of highly optimized subsystems.

Download or read book Design Methodologies for Multi mode and Multi standard Low noise Amplifiers written by Gabrielle Guitton and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent enthusiasm for the Internet of Objects as well as for satellite communications leads to the need for high-performance radio-frequency (RF) communication systems. In order to meet the constraints of the mass market, these systems must be compact and be as low power as possible. Beside, they are expected to address multiple communication standards and to adjust their performance to the environment, still in order to reduce the size and the power consumption. Currently, many works focus on the development of low-noise amplifiers (LNA), the most critical block of RF receivers. To address this purpose, the goal is to design multi-mode and multi-standard receivers. Hence, LNAs require design flows that can adapt to the different technologies and topologies in order to meet any given set of specifications. This thesis aims at the development of simple and accurate design methodologies for the implementation of low-noise amplifiers.The first proposed methodology is dedicated to the implementation of a LNA in COTS technology for spatial applications. This LNA offers a broadband matching to address several standards. It is designed to be part of an RF receiver for nano-satellites. Thus, the latter is first studied in order to determine the specifications based on the standards of the targeted applications.The second methodology is dedicated to the implementation of LNAs in CMOS technology for any kind of applications. This methodology is first illustrated with basic topologies and then applied to an highly linear inductorless LNA. The design methodology also enables a fair comparison between the topologies and also CMOS technologies, even the most advanced ones such as the 28 nm FDSOI.Finally, reconfigurability is added to the inductorless LNA, to address several standards while retaining the optimum sizing given by the previously introduced methodology. Indeed, the size and polarization of each transistor are digitally controlled in order to adjust the LNA's performance to a given standard. Furthermore, the study of N-path filters combined with the proposed LNA is explored to improve the linearity of the circuit.

Download or read book Theoretical Analysis and Design Methodologies for Low Noise Amplifiers Based on Tunable Matching Networks written by Mustafa Berke Yelten and published by . This book was released on 2008 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: 5 GHz, Tunable Matching Network, LNA Design, Tunable Low Noise Amplifier.

Download or read book Design of Integrated Full Duplex Wireless Transceivers written by Sameet Ramakrishnan and published by . This book was released on 2016 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for mobile data traffic is projected to exceed 30 exabytes per month in 2020, representing an over 100x increase since 2010. Prior generations of cellular deployments have serviced increased demand largely through use of more bandwidth - from 200KHz in GSM, to now 100MHz in CA-LTE. This method of scaling is closed, as low frequency spectrum has crowded and saturated. A proposed technique to enhance spectrum access in 5G deployments is agile full-duplex (FD) transceivers, which can transmit and receive at overlapped frequencies, or tune to arbitrarily spaced transmit/receive(TX/RX) frequency division duplexed (FDD) channels, to make use of available spectrum. The key problem in such a system is mitigating the interference the system's own transmitter creates for its receiver during simultaneous operation. Current implementations mitigate TX to RX interference at the antenna interface using off-chip, fixed-frequency duplexers, limiting a device's spectrum access to a handful of pre-defined, widely separated TX/RX band combinations. Accordingly, a universal mobile device tunable across global carrier band combinations does not exist. This work develops a transceiver architecture enabling simultaneous transmission and reception on a single single shared antenna, over a wide frequency tuning range, for FD/FDD systems. The architecture is enabled by an active TX replica which cancels interference at the RX input, a highly linear passive-mixer first receiver design based on class-AB transconductors which operates linearly in the presence of residual TX interference, and digital adaptation techniques which match the interference over time-varying operating conditions. Analysis is presented for the system's fundamental performance bounds in power and sensitivity, leading to noise mitigation techniques which minimize receiver degradation in the presence of the cancellation circuits. The analysis is validated by two chip prototypes, which demonstrate over $>$50dB cancellation of a +16dBm peak 20MHz TX signal, from 1GHz to 2GHz, up to an antenna VSWR of 5:1. This work demonstrates the potential for a fully integrated, frequency-tunable FD/FDD transceiver system, which could ultimately double existing mobile network capacity, and enable a universal duplexer-less radio.

Download or read book Blocker tolerant Integrated Tunable Filters in CMOS for Next Generation Wireless Communication written by Md Naimul Hasan and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern wireless communication standards support numerous frequency bands. A dedicated surface acoustic wave (SAW) filter is assigned to each single band to isolate the desired frequency bands. As a result, multiple SAW filters are necessary to cover different frequency bands which clearly increases cost and form factor. There is a strong demand towards complete integrated solutions to reduce the cost and form-factor of wireless devices. However, it is quite challenging to build integrated high-performance bandpass filters. The inherent losses associated with on-chip inductors lead to filters having relatively high insertion losses, limited dynamic range and low out-of-band rejection. For this reason, nowadays, most wireless systems utilize individual off-chip filters rather than fully integrated bandpass filters. A cellular radio receiver is required to recover a weak desired signal in presence of other in-band and out-of-band interfering signals (blockers). These interfering signals near the desired signal need to be suppressed. To that end, a band selection filter is used to provide attenuation for out-of-band signals, and a subsequent baseband lowpass channel select filters provide channel selection. Existing filters providing channel selection directly at RF for cellular applications does not have adequate rejection in the stopband to full LTE requirements. In this thesis, several techniques based on N-path filters have been proposed to handle large out-of-band blockers. The ultimate rejection of classical N-path fillter is limited due to non-zero switch resistance. A cascaded configuration of bandpass (BP) and bandstop (BS) filter is utilized to create notches on both sides of the passband where the center frequency of bandstop filters are shifted by using feed-forward and feedback g[subscript m] cell. The filter is tunable from 0.2 GHz to 1.8 GHz. The proposed tunable filter has 48.3 dB rejection at 20 MHz offsetand has 58.8 dB rejection at 45 MHz offset from the center frequency. The simulated stop-band rejection of the filter is 71.2 dB. However, it is diffcult to create nearby notches without affecting the passband response of the later. To overcome the above diffculty, a new architecture is presented based on two-path signal cancellation technique to create notches close to the passband to handle large blockers. The filter consists of a tunable BPF in parallel with tunable BS filters. Due to the subtraction of BP and BS filters two notches can be created. This combination ensures the correct amplitude and phase relationships across a wide tuning range to create adjustable TZs without sacrificing the gain of the passband. This paper presents in detail the design considerations and guidelines, as well as analysis of the filter performance in the presence of non-idealities such as parasitics and imperfect clock signal shape. The proposed filter is implemented with high-Q N-path lter blocks in a 65-nm CMOS process. The passband of the filter is tunable from 0.1 GHz to 1.4 GHz with a 3-dB bandwidth of 9.8-10.2 MHz, a gain of 21.5-24 dB, a noise figure of 3-4.2 dB, and a total power consumption of 50-73 mW. TZs are created on both sides of the passband with a minimal offset of 25 MHz and are tunable across a 20 MHz range with up to 60 dB rejection. The measured blocker 1-dB compression point is 8 dBm and the out-of-band IIP3 is 23 dBm. The reported filter provides a promising on-chip filtering solution for multi-standard, multi-frequency software-dened radio applications with improved interference mitigation capabilities. Various on-chip techniques to handle out-of-band blockers have been proposed recently. Although these approaches are suitable for suppressing a single frequency blocker, the created single-frequency notch is not effective in presence of wideband blockers which is becoming more prevalent with the development in high-speed wireless communications. A tunable active bandpass filter with bandwidth-adjustable notches close to the passband for wideband blocker suppression with high attenuation is designed and fabricated. The proposed filter is composed of a 3-pole N-path bandstop filter in cascade with an Npath bandpass filter, where the center frequency of the bandpass filter is offset from the bandstop filters. With proper tuning of the coupling capacitors in the bandstop filter, three adjacent notches can be created which provides a larger suppression bandwidth. An implementation of the filter in 65-nm CMOS exhibits a passband tunable between 0.1-1.1 GHz, with a 3-dB bandwidth of 12.4-14.2 MHz, a gain of 9.5-10.3 dB, a noise figure of 4.3-5.8 dB, and a total power consumption of 40-64.3mW. The blocker 1-dB compression point is 6.5 dBm and the out-of-band IIP3 is 18.4 dBm.

Download or read book Highly Linear Low Noise Amplifier written by Sivakumar Ganesan and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The CDMA standard operating over the wireless environment along with various other wireless standards places stringent specifications on the RF Front end. Due to possible large interference signal tones at the receiver end along with the carrier, the Low Noise Amplifier (LNA) is expected to provide high linearity, thus preventing the intermodulation tones created by the interference signal from corrupting the carrier signal. The research focuses on designing a novel LNA which achieves high linearity without sacrificing any of its specifications of gain and Noise Figure (NF). The novel LNA proposed achieves high linearity by canceling the IM3 tones in the main transistor in both magnitude and phase using the IM3 tones generated by an auxiliary transistor. Extensive Volterra series analysis using the harmonic input method has been performed to prove the concept of third harmonic cancellation and a design methodology has been proposed. The LNA has been designed to operate at 900MHz in TSMC 0.35um CMOS technology. The LNA has been experimentally verified for its functionality. Linearity is usually measured in terms of IIP3 and the LNA has an IIP3 of +21dBm, with a gain of 11 dB, NF of 3.1 dB and power consumption of 22.5 mW.

Download or read book Integrated Tunable Duplexer in CMOS Technology for Multiband Cellular Transceivers written by Sherif H. Abdelhalem and published by . This book was released on 2013 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frequency division duplex (FDD) cellular standards, like WCDMA and LTE, require the simultaneous operation of the transmitter and receiver while sharing the same antenna. A duplexer, currently implemented as two highly selective off-chip SAW filters separates the transmit and receive signals. A high isolation is required to avoid saturating the receiver and keep its noise and linearity requirements feasible. The need for high-Q resonators to implement these filters prohibits duplexer integration in a CMOS process. For each band of a modern multi-band transceiver, an off-chip duplexer is required. With over forty bands currently envisioned for mobile applications, the system cost and complexity rises significantly. Replacing the bank of off-chip duplexers with a single integrated tunable duplexer would enable a fully integrated and reconfigurable multiband transceiver. In this dissertation, the performance of hybrid transformer based integrated duplexer was significantly improved, making it suitable for reliable multiband operation. A hybrid transformer relies on electrical balance rather than frequency selectivity to achieve isolation, making duplexer integration in a CMOS process that lacks high-Q passives possible. Prior demonstrations of integrated hybrid transformer duplexers suffered from high insertion loss, poor common-mode isolation and isolation sensitivity to antenna mismatch. Novel solutions were reached in this research to solve most of these issues. Power recovery by using an RF-DC converter can effectively reduce the loss in the duplexer. A discrete prototype that achieves 60% power recycling efficiency with constant input impedance over wide dynamic range was demonstrated. A differential implementation of the hybrid transformer allows for both high differential and common-mode isolation. Implemented in a 90nm CMOS process, it maintains more than 60 dB of differential to common-mode isolation. And finally, an antenna impedance tracking loop was demonstrated to track any antenna impedance variation and maintain high isolation. Together with a novel high power balance network, that allows high isolation in both the transmit and receive bands, this 65nm CMOS chip achieves an isolation of more than 50 dB in the transmit and receive bands, with an antenna VSWR within 2:1. This work is the first implementation of a CMOS integrated, high-power and antenna mismatch tolerant duplexer.

Download or read book Varactor tunable Dual band Filtering Low noise Amplifier written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book mm Wave Silicon Technology written by Ali M. Niknejad and published by Springer Science & Business Media. This book was released on 2008-01-03 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles and presents the research results from the past five years in mm-wave Silicon circuits. This area has received a great deal of interest from the research community including several university and research groups. The book covers device modeling, circuit building blocks, phased array systems, and antennas and packaging. It focuses on the techniques that uniquely take advantage of the scale and integration offered by silicon based technologies.

Download or read book RF System Design of Transceivers for Wireless Communications written by Qizheng Gu and published by Springer Science & Business Media. This book was released on 2006-05-03 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is for RF Engineers and, in particular, those engineers focusing mostly on RF systems and RFIC design. The author develops systematic methods for RF systems design, complete with a comprehensive set of design formulas. Its focus on mobile station transmitter and receiver system design also applies to transceiver design of other wireless systems such as WLAN. This comprehensive reference work covers a wide range of topics from general principles of communication theory, as it applies to digital radio designs to specific examples on implementing multimode mobile systems.

Download or read book Microwave Circuit Design Using Linear and Nonlinear Techniques written by George D. Vendelin and published by John Wiley & Sons. This book was released on 2005-10-03 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate handbook on microwave circuit design with CAD. Full of tips and insights from seasoned industry veterans, Microwave Circuit Design offers practical, proven advice on improving the design quality of microwave passive and active circuits-while cutting costs and time. Covering all levels of microwave circuit design from the elementary to the very advanced, the book systematically presents computer-aided methods for linear and nonlinear designs used in the design and manufacture of microwave amplifiers, oscillators, and mixers. Using the newest CAD tools, the book shows how to design transistor and diode circuits, and also details CAD's usefulness in microwave integrated circuit (MIC) and monolithic microwave integrated circuit (MMIC) technology. Applications of nonlinear SPICE programs, now available for microwave CAD, are described. State-of-the-art coverage includes microwave transistors (HEMTs, MODFETs, MESFETs, HBTs, and more), high-power amplifier design, oscillator design including feedback topologies, phase noise and examples, and more. The techniques presented are illustrated with several MMIC designs, including a wideband amplifier, a low-noise amplifier, and an MMIC mixer. This unique, one-stop handbook also features a major case study of an actual anticollision radar transceiver, which is compared in detail against CAD predictions; examples of actual circuit designs with photographs of completed circuits; and tables of design formulae.

Download or read book Analog and Digital Signals and Systems written by R. K. Rao Yarlagadda and published by Springer Science & Business Media. This book was released on 2010-08-05 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a systematic, comprehensive treatment of analog and discrete signal analysis and synthesis and an introduction to analog communication theory. This evolved from my 40 years of teaching at Oklahoma State University (OSU). It is based on three courses, Signal Analysis (a second semester junior level course), Active Filters (a first semester senior level course), and Digital signal processing (a second semester senior level course). I have taught these courses a number of times using this material along with existing texts. The references for the books and journals (over 160 references) are listed in the bibliography section. At the undergraduate level, most signal analysis courses do not require probability theory. Only, a very small portion of this topic is included here. I emphasized the basics in the book with simple mathematics and the soph- tication is minimal. Theorem-proof type of material is not emphasized. The book uses the following model: 1. Learn basics 2. Check the work using bench marks 3. Use software to see if the results are accurate The book provides detailed examples (over 400) with applications. A thr- number system is used consisting of chapter number – section number – example or problem number, thus allowing the student to quickly identify the related material in the appropriate section of the book. The book includes well over 400 homework problems. Problem numbers are identified using the above three-number system.

Download or read book RF and Microwave Transmitter Design written by Andrei Grebennikov and published by John Wiley & Sons. This book was released on 2011-09-19 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: RF and Microwave Transmitter Design is unique in its coverage of both historical transmitter design and cutting edge technologies. This text explores the results of well-known and new theoretical analyses, while informing readers of modern radio transmitters' pracitcal designs and their components. Jam-packed with information, this book broadcasts and streamlines the author's considerable experience in RF and microwave design and development.