Design of a High Quality Factor Spiral Inductors in RF MCM-D PDF Download
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Author: Joshua Peters
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Book Description
This thesis studies the design and fabrication of spiral inductors for use in Radio Frequency (RF) applications. A design methodology is developed to search an inductor design space efficiently using existing simulation software. The methodology allows designers to specify a desired inductance, total area, and frequency of operation instead of the geometrical parameters required by most design software. An implementation of the methodology that finds devices with optimal quality factor at a given frequency is presented. Several inductor designs are generated using this implementation, and the devices are fabricated in the Draper Laboratory, Inc. Multichip Module-Deposited (MCM-D) process. Simulated characteristics of the devices are verified using experimental measurements, and deviations from predicted performance are discussed.
Author: Joshua Peters
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Book Description
This thesis studies the design and fabrication of spiral inductors for use in Radio Frequency (RF) applications. A design methodology is developed to search an inductor design space efficiently using existing simulation software. The methodology allows designers to specify a desired inductance, total area, and frequency of operation instead of the geometrical parameters required by most design software. An implementation of the methodology that finds devices with optimal quality factor at a given frequency is presented. Several inductor designs are generated using this implementation, and the devices are fabricated in the Draper Laboratory, Inc. Multichip Module-Deposited (MCM-D) process. Simulated characteristics of the devices are verified using experimental measurements, and deviations from predicted performance are discussed.
Author: Richard D. Lutz
Publisher:
ISBN:
Category : Electric inductors
Languages : en
Pages : 310
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Book Description
Spiral inductors are a key component of mixed-signal and analog integrated circuits (IC's). Such circuits are often fabricated using silicon-based technology, owing to the inherent low-cost and high volume production aspects. However, semiconducting substrate materials such as silicon can have adverse effects on spiral inductor performance due to the lossy nature of the material. Since the operating requirements of many high performance IC's demand reactive components that have high Quality Factor's (Q's), and are thus low loss devices, the need for accurate modeling of such structures over lossy substrate media is key to successful circuit design. The Q's of commonly available off-chip inductors are in the range of 50- 100 for frequencies ranging up to a few gigahertz. Since off-chip inductors must be connected through package pins, solder bumps, etc., which all contribute additional loss and thus lower the apparent Q of an external device, the typical on-chip Q requirement for a given RFIC design is generally lower than that for an off-chip spiral solution. However, a spiral inductor that was designed and fabricated originally in a low loss technology such as thin-film alumina may have substantially worse performance in regard to Q if it is used in a silicon-based technology, owing to the conductive substrate. For this reason, it is imperative that semiconducting substrate effects be accurately accounted for by any modeling effort for monolithic spirals in RFICs. This thesis presents a complete modeling solution for both single and multi-level spiral inductors over lossy silicon substrates, along with design considerations and methods for mitigation of the undesirable performance effects of semiconducting substrates. The modeling solution is based on Spectral Domain Approach (SDA) solutions for frequency dependent complex capacitive (i.e. both capacitance and conductance) parasitic elements combined with a quasi-magnetostatic field solution for calculation of the frequency dependent complex inductive (i.e. both inductance and resistance) terms. The effects of geometry and process variations are considered as well as the incorporation of Patterned Ground Shields (PGS) for the purpose of Q enhancement. Proposals for future extensions of this work are discussed in the concluding chapter.
Author: Genemala Haobijam
Publisher: Springer Science & Business Media
ISBN: 813221515X
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
The book addresses the critical challenges faced by the ever-expanding wireless communication market and the increasing frequency of operation due to continuous innovation of high performance integrated passive devices. The challenges like low quality factor, design complexity, manufacturability, processing cost, etc., are studied with examples and specifics. Silicon on-chip inductor was first reported in 1990 by Nguyen and Meyer in a 0.8 μm silicon bipolar complementary metal oxide semiconductor technology (BiCMOS). Since then, there has been an enormous progress in the research on the performance trends, design and optimization, modeling, quality factor enhancement techniques, etc., of spiral inductors and significant results are reported in literature for various applications. This book introduces an efficient method of determining the optimized layout of on chip spiral inductor. The important fundamental tradeoffs of the design like quality factor and area, quality factor and inductance, quality factor and operating frequency, maximum quality factor and the peak frequency is also explored. The authors proposed an algorithm for accurate design and optimization of spiral inductors using a 3D electromagnetic simulator with minimum number of inductor structure simulations and thereby reducing its long computation time. A new multilayer pyramidal symmetric inductor structure is also proposed in this book. Being multilevel, the proposed inductor achieves high inductance to area ratio and hence occupies smaller silicon area.
Author: Ali M. Niknejad
Publisher: Springer Science & Business Media
ISBN: 0306470381
Category : Technology & Engineering
Languages : en
Pages : 193
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Book Description
The modern wireless communication industry has put great demands on circuit designers for smaller, cheaper transceivers in the gigahertz frequency range. One tool which has assisted designers in satisfying these requirements is the use of on-chip inductiveelements (inductors and transformers) in silicon (Si) radio-frequency (RF) integrated circuits (ICs). These elements allow greatly improved levels of performance in Si monolithic low-noise amplifiers, power amplifiers, up-conversion and down-conversion mixers and local oscillators. Inductors can be used to improve the intermodulation distortion performance and noise figure of small-signal amplifiers and mixers. In addition, the gain of amplifier stages can be enhanced and the realization of low-cost on-chip local oscillators with good phase noise characteristics is made feasible. In order to reap these benefits, it is essential that the IC designer be able to predict and optimize the characteristics of on-chip inductiveelements. Accurate knowledge of inductance values, quality factor (Q) and the influence of ad- cent elements (on-chip proximity effects) and substrate losses is essential. In this book the analysis, modeling and application of on-chip inductive elements is considered. Using analyses based on Maxwells equations, an accurate and efficient technique is developed to model these elements over a wide frequency range. Energy loss to the conductive substrate is modeled through several mechanisms, including electrically induced displacement and conductive c- rents and by magnetically induced eddy currents. These techniques have been compiled in a user-friendly software tool ASITIC (Analysis and Simulation of Inductors and Transformers for Integrated Circuits).
Author: Amal Banerjee
Publisher: Springer Nature
ISBN: 303108778X
Category : Technology & Engineering
Languages : en
Pages : 197
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Book Description
This book presents a novel, automated, accurate and unified scheme to design and determine the performance characteristics of standalone planar, spiral inductors and multiple coupled planar spiral inductors (as in embedded transformers), for RF/microwave MMIC designers. The author demonstrates with a set of analysis/design examples a novel scheme that exploits judiciously the existing transmission theory and concepts, organizing and condensing available, scattered information/knowledge about planar spiral inductor, embedded planar transformer and planar antenna design and performance evaluation, into one coherent and unified electronic circuit model easily used by radio frequency electronic circuit engineers. A dedicated chapter contains an exhaustive (19) set of design examples. Presents a bottom-up scheme, starting with Maxwell's equations of classical electrodynamics and transmission line theory (Telegrapher's equation), specifically microstrips; Demonstrates design of standalone planar, spiral inductors and multiple coupled planar spiral inductors; Includes a set of ready-to-use, C executables (for both Linux and Windows) , that accept predefined input parameters for each of the sub-circuits discussed and generate SPICE netlists for the equivalent electrical circuit; Automates execution of multi-step design calculations to guarantee their accuracy and reliability.
Author: Jaime Aguilera
Publisher: Springer Science & Business Media
ISBN: 0306487055
Category : Technology & Engineering
Languages : en
Pages : 203
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Book Description
Intended for engineers who are starting out in the design of integrated inductors, this book describes the whole design flow, basic selection of the geometry and optimisation of the quality by redesigning the geometry, measurement and de-embedding and characterisation.
Author: Shengyu Jin
Publisher:
ISBN: 9781303015014
Category :
Languages : en
Pages : 70
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Book Description
This research focuses on the study to explore silicon CMOS on-chip inductors which are suitable for high radio frequency (RF) power applications. Silicon on-chip inductors are typically used in RF circuit building blocks operating with a small signal (RF power much less than 10 dBm) such as LNAs, mixers, input matching circuits for PA. And its equivalent circuit model is developed with linear circuit elements only valid in small signal conditions. However, not much work has been done to investigate nonlinear circuit model of on-chip inductors and to explore its use in RF circuits operating at high RF power conditions (up to 35dBm or more). This work is trying to fill this blank. After extensive analysis of loss mechanism for such silicon on-chip inductor especially spiral inductors, a large signal model for on-chip inductor is presented and performance is predicted under high RF power: self-heating due to high RF power causes quality factor Q degrading noticeably. Then a couple experiments are carried out to verify such self-heating effect due to high RF power. To get more insights in this problem, a simulation approach is developed with help of multi-physics software which can couple such electromagnetic and thermal processes. This simulation approach is verified and calibrated by liquid crystal thermography. Such simulation approach can detect the weakest point of inductor design and evaluate different designs as well. With modern packaging technology, 3-D high Q solenoid on-chip inductors are possible. A careful designed 3-D high Q solenoid on-chip inductor is proposed and is proved its suitability for high power RF applications by simulations.
Author: Ji Chen
Publisher:
ISBN:
Category : Electric inductors
Languages : en
Pages : 109
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Book Description
Passive components are indispensable in the design and development of microchips for high-frequency applications. Inductors in particular are used frequently in radio frequency (RF) IC's such as low-noise amplifiers and oscillators. High performance inductor has become one of the critical components for voltage controlled oscillator (VCO) design, for its quality factor (Q) value directly affects the VCO phase noise. The optimization of inductor layout can improve its performance, but the improvement is limited by selected technology. Inductor performance is bounded by the thin routing metal and small distance from lossy substrate. On the other hand, the in-accurate inductor modeling further limits the optimization process.
Author: Charvak P. Karpe
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
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Book Description
The miniaturization of radio frequency wireless communications circuitry has resulted in a need for smaller inductors. This thesis presents designs of spiral inductors to be fabricated in Draper Laboratory's integrated Ultra High Density packaging process. The inductor designs are simulated using Ansoft's High Frequency Structure Simulator and the resulting inductor performance parameters are used to design a voltage controlled oscillator (VCO) meeting 802.1 lb wireless specifications. The design demonstrates the importance of inductor quality factor in minimizing phase noise. It is also shown that further improvements can be made to RF integrated circuits by increasing the maximum load impedance seen by the VCO.
Author:
Publisher:
ISBN:
Category : Microelectronic packaging
Languages : en
Pages : 566
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Book Description
