Download or read book Design of Current Reused Voltage Controlled Oscillators written by 陳家佑 and published by . This book was released on 2008 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microelectronics Electromagnetics and Telecommunications written by Ganapati Panda and published by Springer. This book was released on 2018-11-02 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book discusses the latest developments and outlines future trends in the fields of microelectronics, electromagnetics and telecommunication. It contains original research works presented at the International Conference on Microelectronics, Electromagnetics and Telecommunication (ICMEET 2018), organised by GVP College of Engineering (A), Andhra Pradesh, India. The respective papers were written by scientists, research scholars and practitioners from leading universities, engineering colleges and R&D institutes from all over the world, and share the latest breakthroughs in and promising solutions to the most important issues facing today’s society.
Download or read book A Design and Analysis of High Performance Voltage Controlled Oscillators written by Bin Wan and published by . This book was released on 2006 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Low phase noise and Low power Current controlled Oscillators written by Junhong Zhao and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of High Performance CMOS Voltage Controlled Oscillators written by Liang Dai and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of High-Performance CMOS Voltage-Controlled Oscillators presents a phase noise modeling framework for CMOS ring oscillators. The analysis considers both linear and nonlinear operation. It indicates that fast rail-to-rail switching has to be achieved to minimize phase noise. Additionally, in conventional design the flicker noise in the bias circuit can potentially dominate the phase noise at low offset frequencies. Therefore, for narrow bandwidth PLLs, noise up conversion for the bias circuits should be minimized. We define the effective Q factor (Qeff) for ring oscillators and predict its increase for CMOS processes with smaller feature sizes. Our phase noise analysis is validated via simulation and measurement results. The digital switching noise coupled through the power supply and substrate is usually the dominant source of clock jitter. Improving the supply and substrate noise immunity of a PLL is a challenging job in hostile environments such as a microprocessor chip where millions of digital gates are present.
Download or read book CMOS Voltage current Controlled Oscillator Designs and Applications written by Rohit Yadav and published by . This book was released on 2020 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: In advanced short-channel CMOS processes, analog circuit-design poses significant challenges imposed by the low power-supply voltage, and the reduced intrinsic-gain of short channel-effects of CMOS-transistors. However, continued scaling of CMOS devices makes them faster and thus enables the design of high-speed circuits such as oscillators at lower power-levels. Voltage and current-controlled oscillators are essential building blocks for designing Delta-Sigma analog-to-digital converters (ADC) that do not require a sample and hold circuits up front. This research focuses on designing scaling-friendly, linear, low-power CMOS relaxation-oscillators for Delta-Sigma analog to digital conversion. Ring oscillators using an odd number of digital-inverters provide a simple reliable-solution, and thus are popular. So the first approach is to increase the speed (time-resolution) by simply lowering the inverter-gain using the translinear and temperature-invariant voltage-mirror circuits instead of open-loop inverters. Here two scaled-inverters are used to obtain gain exploiting the function and its functional inverse idea to obtain the required loop-gain. Here we are simply trading gain to increase speed at the expense of power. An alternative approach is to use the gyrator circuit to emulate an inductor. Two transconductors with opposite polarity current-output are needed to form a gyrator. Inverting the output-polarity is achieved using a translinear, unity-gain current-mirror achieving stability of the gyrator circuit that uses negative feedback. Using these, an LC -coupled ring-oscillator is emulated. These provide a more robust solution. Process, supply-voltage and temperature (PVT) variations are traditionally minimized by the well-established technique of negative-feedback in circuits using Bandgap reference voltage and passive elements like MIM capacitors. Thus the design of an operational current to frequency converter (OCFC) is proposed. This is inspired by the success of the notion of an operational amplifier (OPAMP) that has a very large gain. It is always configured to trade gain for obtaining linearity using negative- feedback making the feedback network set the precision of the transfer function. The OCFC uses the same idea using a switched-capacitor linear frequency-to-current detector in the feedback path to make the closed-loop tuning-curve linear, having a low temperature-coefficient. The design of a simple linear oscillator based on a traditional multivibrator-circuit is explored for two specific applications. There is a need for a medium-resolution low-speed 10-bit ADC for IOT applications. The other is for a 6-bit converter for high-speed data-communication systems. The idea is to obtain the performance requirements with no need for power-hungry digital-calibration. Manufacturability, and cost are the prime focus here. Finally, an open loop Delta-Sigma modulator designed using pseudo-differential ring oscillators is explored for low bandwidth and medium resolution analog-to-digital conversion applications. It employs a nonlinearity cancellation technique in the voltage-to-current (V/I) converter to improve resolution. Most of the circuit can be synthesized using digital toolchain except for the front-end V/I converter to reduce turn-around time. All the circuits presented in this thesis are verified at multiple process nodes ranging from 180nm to 22nm. The simulation-results presented here are mostly using the models for the 180nm TSMC process
Download or read book Design of Voltage Controlled Oscillators written by Monika Bhardwaj and published by . This book was released on 2011-11 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Implementation of 30 60 ghz Cmos Voltage controlled Oscillators written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Designer s Guide to High Purity Oscillators written by Emad Eldin Hegazi and published by Springer Science & Business Media. This book was released on 2006-07-18 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: try to predict it using mathematical expressions. His heuristic model without mathematical proof is almost universally accepted. However, it entails a c- cuit specific noise factor that is not known a priori and so is not predictive. In this work, we attempt to address the topic of oscillator design from a diff- ent perspective. By introducing a new paradigm that accurately captures the subtleties of phase noise we try to answer the question: 'why do oscillators behave in a particular way?' and 'what can be done to build an optimum design?' It is also hoped that the paradigm is useful in other areas of circuit design such as frequency synthesis and clock recovery. In Chapter 1, a general introduction and motivation to the subject is presented. Chapter 2 summarizes the fundamentals of phase noise and timing jitter and discusses earlier works on oscillator's phase noise analysis. Chapter 3 and Chapter 4 analyze the physical mechanisms behind phase noise generation in current-biased and Colpitts oscillators. Chapter 5 discusses design trade-offs and new techniques in LC oscillator design that allows optimal design. Chapter 6 and Chapter 7 discuss a topic that is typically ignored in oscillator design. That is flicker noise in LC oscillators. Finally, Chapter 8 is dedicated to the complete analysis of the role of varactors both in tuning and AM-FM noise conversion.
Download or read book Design Techniques for Low Phase Noise MMIC Voltage Controlled Oscillators written by Massimo Pirazzini and published by . This book was released on 2005 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Techniques for Low noise LV Voltage controlled Oscillators written by Babak Soltanian and published by . This book was released on 2006 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sinusoidal Oscillators and Waveform Generators using Modern Electronic Circuit Building Blocks written by Raj Senani and published by Springer. This book was released on 2015-11-26 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a single-source reference to sinusoidal oscillators and waveform generators, using classical as well as a variety of modern electronic circuit building blocks. It provides a state-of-the-art review of a large variety of sinusoidal oscillators and waveform generators and includes a catalogue of over 600 configurations of oscillators and waveform generators, describing their relevant design details and salient performance features/limitations. The authors discuss a number of interesting, open research problems and include a comprehensive collection of over 1500 references on oscillators and non-sinusoidal waveform generators/relaxation oscillators. Offers readers a single-source reference to everything connected to sinusoidal oscillators and waveform generators, using classical as well as modern electronic circuit building blocks; Provides a state-of-the-art review of a large variety of sinusoidal oscillators and waveform generators; Includes a catalog of over 600 configurations of oscillators and waveform generators, with their relevant design details and their salient performance features/limitations.
Download or read book Design of Voltage Controlled Oscillators for Use in Indirect Frequency Synthesizers written by Donald J. Wilson and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Phase Noise Voltage controlled Oscillator Design written by Zhipeng Zhu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two kinds of voltage-controlled oscillators (VCO)--active inductor based VCO and LC cross-coupled VCO--are studied in this work. Although the phase noise performance is not competitive, the proposed active inductor based VCO provide an alternative method to VCO design with very small chip area and large tuning range. The measurement shows a test oscillator based on active inductor topology successfully oscillates near 530MHz band. The phase noise of the widely used LC cross-coupled VCO is extensively investigated in this work. Under the widely used power dissipation and chip area constraints, a novel optimization procedure in LC oscillator design centered on a new inductance selection criterion is proposed. This optimization procedure is based on a physical phase noise model. From it, several closed-form expressions are derived to describe the phase noise generated in the LC oscillators, which indicate that the phase noise is proportional to the L2· gL3 factor. The minimum value of this factor for an area-limited spiral inductor is proven to monotonically decrease with increasing inductance, suggesting a larger inductance is helpful to reduce the phase noise in LC VCO design. The validity of the optimization procedure is proven by simulations. Two test chips are designed and measured.
Download or read book Millimeter Wave Voltage Controlled Oscillators in 0 13 micrometer CMOS Technology written by and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the design of CMOS millimeter-wave voltage controlled oscillators. Varactor, transistor, and inductor designs are optimized to reduce the parasitic capacitances. An investigation of tradeoff between quality factor and tuning range for MOS varactors at 24 GHz has shown that the polysilicon gate lengths between 0.18 and 0.24 micrometer result in both good quality factor (>12) and Cmax/Cmin ratio (~3) in the 0.13-micrometer CMOS process used for the study. The components were utilized to realize a VCO operating around 60 GHz with a tuning range of 5.8 GHz. A 99-GHz VCO with a tuning range of 2.5 GHz, phase noise of --102.7 dBc/Hz at 10-MHz offset and power consumption of 7-15 mW from a 1.5-V supply and a 105-GHz VCO are also demonstrated. This is the CMOS circuit with the highest fundamental operating frequency. The lumped element approach can be used even for VCOs operating near 100-GHz and it results in a smaller circuit area.
Download or read book RF and Microwave Power Amplifier Design written by Andrei Grebennikov and published by McGraw Hill Professional. This book was released on 2004-09-15 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a rigorous tutorial on radio frequency and microwave power amplifier design, teaching the circuit design techniques that form the microelectronic backbones of modern wireless communications systems. Suitable for self-study, corporate training, or Senior/Graduate classroom use, the book combines analytical calculations and computer-aided design techniques to arm electronic engineers with every possible method to improve their designs and shorten their design time cycles.
Download or read book Design and Characterization of Voltage Controlled Oscillators Using Thin Film Resonator Based Filters written by Philip Howard Thompson and published by . This book was released on 1989 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
