Download or read book Residual Phase Noise Modelling of Silicon Bipolar Amplifiers and Ultra Low Phase Noise Ceramic Dielectric Resonator Oscillators written by Konstantinos Theodoropoulos and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes research into the modelling of residual 1/ f phase noise for Si bipolar amplifiers operating in the linear region and the design construction and measurements of L-Band (1.2 GHz) and C-Band (4.2 GHz and 4.6 GHz) ceramic dielectric resonator based ultra low phase noise oscillators using Si devices. It proposed and demonstrated that for Si bipolar amplifiers the 1/ f phase noise is largely due to the base emitter recombination flicker noise. The up conversion mechanism is described through linear approximation of the phase variation of the amplifier phase response by the variation of the device parameters (Cbc, Cbe, gm, re) caused by the recombination 1/ f noise. The amplifier phase response describes the device over the whole frequency range of operation where the influence of the poles and zeros is investigated. It is found that for a common emitter amplifier it is sufficient to only incorporate the effect of the device poles to describe the phase noise behaviour over most of its operational frequency range. Simulations predict the measurements of others including the flattening of the PM noise at frequencies beyond f3dB, not predicted by previous models. A novel ceramic dielectric resonator based oscillator at 1.2 GHz is described. The oscillator achieves phase noise of -171.8 d. Bc] Hz at 10 kHz offset and ~ 144.5 d. Bc] H z at 1 kHz which is the lowest noise reported in the literature at this frequency band. To achieve these results extensive optimisation of amplifiers has been taken place. For example the amplifiers used in the oscillator produce a very low phase noise better than -182 dBc / Hz at 10 kHz and -175 dBc / Hz at 1 kHz offset from the carrier respectively. Also low residual phase noise narrow band tuning and high power handling phase shifters are reported for the use in oscilIator. Two oscillators at C-Band (4.2 GHz and 4.6 GHz) based on ceramic resonators are described. The 4.2 GHz Oscillator provides a phase noise of -153 dBc/ Hz at 10 kHz and -128 dBc/ Hz at 1 kHz offset from the carrier, which is the lowest reported in literature for that type of oscillators. The 4.6 GHz oscillator phase noise is -149 d. Bc/Hz at 10 kHz and -119.2 d. Bc/Hz at 1 kHz offsets respectively. Both oscillators used the same configuration and the same amplification devices and topology. The improved performance is mainly due to the use of low residual phase noise silicon bipolar amplifiers operated in a push pull configuration, where in literature amplifiers employing SiGe HBTs have been used.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultra Low Phase Noise with Low Residual Flicker Noise Microwave Oscillators written by Carl Broomfield and published by . This book was released on 2005 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Modelling of Jitter and Phase Noise in Electronic Systems written by Toby-Daniel Tomlin and published by . This book was released on 2004 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timing jitter and phase noise are important design considerations in most electronic systems, particularly communication systems. The desire for faster transmission speeds and higher levels of integration, combined with lower signal levels and denser circuit boards has placed greater emphasis on managing problems related to phase noise, timing jitter, and timing distribution. This thesis reports original work on phase noise modelling in electronic systems. A new model is proposed which predicts the up-conversion of baseband noise to the carrier frequency in RF amplifiers. The new model is validated by comparing the predicted phase noise performance to experimental measurements as it applies to a common emitter (CE), bipolar junction transistor (BJT) amplifier. The results show that the proposed model correctly predicts the measured phase noise, including the shaping of the noise about the carrier frequency, and the dependence of phase noise on the amplifier parameters. In addition, new work relating to timing transfer in digital communication systems is presented. A new clock recovery algorithm is proposed for decoding timing information encoded using the synchronous residual time-stamp (SRTS) method. Again, theoretical analysis is verified by comparison with an experimental implementation. The results show that the new algorithm correctly recovers the source clock at the destination, and satisfies the jitter specification set out by the ITU-T for G.702 signals.
Download or read book Phase Noise Reduction in Bipolar Transistor Amplifiers Through Active Low Frequency Feedback written by Matthew J. Luce and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Noise in Signal Sources written by W. P. Robins and published by Institution of Engineering & Technology. This book was released on 1984 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a thorough treatment of phase noise, its relationship to thermal noise and associated subjects such as frequency stability. The design of low phase noise signal sources, including oscillators and synthesisers, is explained and in many cases the measured phase noise characteristics are compared with the theoretical predictions. Full theoretical treatments are combined with physical explanations, helpful comments, examples of manufactured equipment and practical tips. Overall system performance degradations due to unwanted phase noise are fully analysed for radar systems and for both analogue and digital communications systems. Specifications for the acceptable phase noise performance of signal sources to be used in such systems are derived after allowing for both technical and economic optimisation. The mature engineer whose mathematics may be somewhat rusty will find that every effort has been made to use the lowest level of mathematical sophistication that is compatible with a full analysis and every line of each mathematical argument has been set out so that the book may be read and understood even in an armchair. Due to a novel approach to the analytical treatment of narrow band noise, the book is simple to understand while simultaneously carrying the analysis further in several areas than any existing publication.
Download or read book Phase Noise Reduction Using Active Biasing written by Jeremy Bart Baldwin and published by . This book was released on 2010 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of phase noise in amplifier and voltage-controller oscillator (VCO) circuits was conducted to show that active direct-current (DC) bias techniques exhibit lower phase noise performance than traditional resistive DC bias techniques. Low-frequency high-gain amplifiers like those found in audio applications exhibit much better 1/f phase noise performance and can be used to bias amplifier or VCO circuits that work at much higher frequencies to reduce the phase modulation caused by higher frequency devices. An improvement in single-side-band (SSB) phase noise of 15 dB at offset frequencies less than 50 KHz was simulated and measured. Residual phase noise of an actively biased amplifier also exhibited significant noise improvements when compared to an equivalent resistive biased amplifier.
Download or read book Microwave and Wireless Synthesizers written by Ulrich L. Rohde and published by John Wiley & Sons. This book was released on 2021-04-27 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of the leading resource on designing digital frequency synthesizers from microwave and wireless applications, fully updated to reflect the most modern integrated circuits and semiconductors Microwave and Wireless Synthesizers: Theory and Design, Second Edition, remains the standard text on the subject by providing complete and up-to-date coverage of both practical and theoretical aspects of modern frequency synthesizers and their components. Featuring contributions from leading experts in the field, this classic volume describes loop fundamentals, noise and spurious responses, special loops, loop components, multiloop synthesizers, and more. Practical synthesizer examples illustrate the design of a high-performance hybrid synthesizer and performance measurement techniques—offering readers clear instruction on the various design steps and design rules. The second edition includes extensively revised content throughout, including a modern approach to dealing with the noise and spurious response of loops and updated material on digital signal processing and architectures. Reflecting today's technology, new practical and validated examples cover a combination of analog and digital synthesizers and hybrid systems. Enhanced and expanded chapters discuss implementations of direct digital synthesis (DDS) architectures, the voltage-controlled oscillator (VCO), crystal and other high-Q based oscillators, arbitrary waveform generation, vector signal generation, and other current tools and techniques. Now requiring no additional literature to be useful, this comprehensive, one-stop resource: Provides a fully reviewed, updated, and enhanced presentation of microwave and wireless synthesizers Presents a clear mathematical method for designing oscillators for best noise performance at both RF and microwave frequencies Contains new illustrations, figures, diagrams, and examples Includes extensive appendices to aid in calculating phase noise in free-running oscillators, designing VHF and UHF oscillators with CAD software, using state-of-the-art synthesizer chips, and generating millimeter wave frequencies using the delay line principle Containing numerous designs of proven circuits and more than 500 relevant citations from scientific journal and papers, Microwave and Wireless Synthesizers: Theory and Design, Second Edition, is a must-have reference for engineers working in the field of radio communication, and the perfect textbook for advanced electrical engineering students.
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1994 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Timing Jitter and Phase Noise in Electronic Oscillators written by Chengwei Zhang and published by . This book was released on 2003 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first part of this dissertation, low frequency l/f or flicker noise in the frequency range of Hz to kHz has been identified and demonstrated to be described by temperature fluctuations in heat conduction in bipolar transistors operated at higher power densities. This noise phenomenon is not described by current SPICE programs used in circuit simulations. This noise in the kHz range can modulate LC oscillators and can be the determining factor in causing phase noise in modern wireless communication systems. At lower frequencies or lower power densities flicker noise may still result from number fluctuations or mobility fluctuations but this is not as important in determining the phase noise at kHz offsets from the carrier frequencies. In the second part of this dissertation work, we have developed a large signal nonlinear transient simulation technique to simulate phase noise due to device noise in electronic oscillators. Simulation results are consistent with Leeson's theory and the magnitude of the sidebands directly scales with the magnitude of injected noise. Simulation also shows phase noise at 4.7 MHz frequency offset is white noise dominated and in good agreement with the experimental data reported in the literature. In the third part of this dissertation work, we have developed a large signal nonlinear transient simulation technique to simulate timing jitter in electronic oscillators. Simulation results are consistent with the accepted theory, analytical formula and A. Hajimiri's analytical model for white noise. Two important parameters cycle jitter, and cycle to cycle jitter used to describe jitter performance can be obtained from simulation. Simulation results are also compared with measurement and close agreement was observed between them. We have employed this methodology and investigated the timing jitter in silicon BJT /or SiGe HBT ECL ring oscillators, and we have shown silicon BJT /or SiGe HBT ring oscillators have lower jitter compared to their CMOS counterparts. As such silicon BJT and/or SiGe HBT ring oscillators are a potential choice for low jitter applications.
Download or read book Phase noise in signal sources theorie and applications written by W. P. Robins and published by . This book was released on 1982 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Scaling Limitations of SiGe HBT Low frequency Noise and Oscillator Phase Noise written by and published by . This book was released on 2006 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Residual Phase Noise Measurements of the Input Section in a Receiver written by and published by . This book was released on 2007 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: If not designed properly, the input section of an analog down-converter can introduce phase noise that can prevail over other noise sources in the system. In the paper we present residual phase noise measurements of a simplified input section of a classical receiver that is composed of various commercially available mixers and driven by an LO amplifier.
Download or read book Phase Noise Models for Single ended Ring Oscillators written by Devavrata Godbole and published by . This book was released on 2000 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tremendous growth of wireless and mobile communications has resulted in placing of stringent requirements on the channel spacing and, by implication, on the phase noise of oscillators, typically mandating the use of passive LC oscillators with high quality factor (Q). However the trend towards large-scale integration and low cost makes it desirable to implement ring oscillators monolithically using CMOS but they generally have inferior phase noise performance compared to LC oscillators. Currently there is no tool available for the designer to analyze the effect of oscillator phase noise on the performance of the communication system. Thus an accurate and efficient, system level model for oscillator phase noise which can be used in simulation is of great importance. In this thesis, two system level phase noise models accurate at the circuit level, namely Hajimiri Phase Noise model and Digital FIR Filter model for Phase Noise are discussed and implemented in MATLAB's SIMULINK environment to bridge the gap in tools available for circuit level design and system level design of communication systems.
Download or read book Impact on Oscillator Phase Noise Due to MMIC Buffer Amplifiers written by Larry W. Miller and published by . This book was released on 1996 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Measurement of Phase Noise in GaAs HBT Ka Band Oscillators written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate oscillator phase-noise simulation is a key problem in MMIC design, which is not solved satisfactory so far and needs further investigation. In this paper, a Ka-band MMIC oscillator with GaInP/GaAs HBT and on-chip resonator is treated as an example. Measured phase noise reaches -90 dBc/Hz and below at 100 kHz offset. To evaluate phase-noise predic-tion, the circuit is simulated using different commercial simulation tools and HBT models. Con-siderable differences in simulation results are observed.
Download or read book A Switching Based Phase Noise Model for CMOS Ring Oscillators Based on Multiple Thresholds Crossing written by Bosco Hok-Chung Leung and published by . This book was released on 2009 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
