cmos inductor


ASITIC Analysis of Si Inductors and Trasformers for ICs, ASITIC is an interactive tool that allows an RF circuit designer to design and simulate spiral inductors and transformers in the IC environment. More generally, ASITIC allows the RF circuit designer to plan and optimize the layout of metal structures, such as capacitors and inductors, in the presence of magnetic and electrical interaction and coupling through the substrate and oxide layers of the IC. Use this program to design, analyze, and optimize planar and non-planar spiral inductor/transformer structures in Si. Also use it to analyze general magnetic and substrate coupling effects.
Ali M Niknejad

This is a program that is freely available from the University of California, Berkley website. In the words of the author, “ASITIC is a CAD tool that aids RF/microwave engineers to analyze, model, and optimize passive metal structures residing on a lossy conductive substrate”. This includes inductors, transformers, capacitors, transmission lines, interconnects and substrate coupling analysis. ASITIC is an Unix based graphical program which runs under the X windows environment. Typing asitic on the shell prompt brings out a layout screen where the user can specify the geometry of the object under test. It supports different kinds of geometries like the square and even non-traditional shapes like the polygon. There are a series of simple commands that help the user layout the spiral and help one manipulate it. The next important step is editing the technology file, which specifies the IC process. In the technology file, specifying the size of the FFT specifies the resolution of the analysis. Different kinds of simulations can be done and the relevant parameters like inductance, quality factor and self-resonant frequency determined at a particular frequency. The program is relatively fast and simple which gives a good first cut for the different design parameters.
Full Documenation ASITIC

Thesis on cmos inductors
Reducing the Substrate Losses of RF Integrated Inductors
fundamental behaviour of an inductor
design articles
inductance extraction from a layout article

ESD Withstand Capability of Multilayer Ceramic Capacitors (MLCs), J. Piper and J. D. Prymak, KEMET Electronics Corporation, and Phil (F.L.) Stair, Ford North Penn Electronics Facility, June, 1995.
spiral inductor simulator free
Free 3D inductance simulator and for package modeling
air coil inductance calculator
online inductance calculator ,
AppCAD spiral inductor designer, matching, and transmission line analysis free
online radio calculator
Spiral Inductor Simulation Program similar to ASITIC free
inductance calculation software ; free
spiral inductor design tool
free passive circuit simulator
QuickHenry ; free inductance/resistance extraction tool
A Surge Stress Test for Tantalum Capacitor , Jim Marshall March

Tutorials and articles on inductor design and analysis
ESSCIRC Website good papers on inductor design
Research papers on inductor design and analysis
Inductor and Choke Design article
Simple inductance expressions for common structures
RF inductor article on discrete inductors
Research paper
inductor in Integrated VCO , research paper
inductor calculations
spiral modeling
Air-coilinductance calculations
inductance calculation and modeling
MATLAB code for finding mutual and self inductance
inductance extraction
inductance publications
Modeling skin effect in inductors
inductor equations
inductor design
survey of some inductance simulation tools
Electromagnetics class notes
Advanced Electromagnetics lecture notes
Electromagnetics Applications lecture notes
Electricity and Magnetism lecture notes

Inductor, capacitor and resistors free download papers
Bulk Cassette Packaging,
IR Reflow Preconditioning, Patricia Hayner
Electrode Development For Multilayer Capacitors, Raymond J. Cooper
Ultra-Low ESR Tantalum Chip Capacitor
Manufacturing of High Capacitance Value MLCC, Christos Kyriacou and March Maguire, February, 1998.
Monolithic High-Q Overhang Inductors Fabricated on Silicon and Glass Substrates,Jun-Bo Yoon , Chul-Hi Han, Euisik Yoon, and Choong-Ki Kim, Department of Electrical Engineering, KAIST, 373-1 Kusong-dong, Yusong-gu, Taejon 305-701, Korea.

Books on Inductors and Electromagnetics
Lumped-Element RF Circuit Design, Inder Bahl Artech.
Design and Simulation of Inductors, Niknejad, Kluwer
Electromagnetics for Engineers, Paul, Wiley.
Numerical Techniques in Electromagnetics, Sadiku,CRC Press,
Electromagnetics for Engineers, Steven E. Schwarz, Oxford
Microwave Circuit Modeling Using Electromagnetic Field Simulation. Swanson, Artech.
Integrated Passive Component Technology, Ulrich et al, Wiley

Modeling and Extraction. This tutorial paper describes the basic concepts of magnetic interaction, loop and partial inductance, along with some of the high frequency effects such as skin and proximity effect.
Analysis and Design Issues. This paper gives a tutorial overview of the analysis and design issues related to on-chip inductance effects.
Modeling and Analysis of Differential Signaling for Minimizing Inductive Cross-Talk. This paper argues that crosstalk in high-speed technologies is best controlled by re-deploying inter-digitated power lines to perform differential signaling.
Full-Chip, Three-Dimensional, Shapes-Based RLC Extraction. In this paper, researchers from Cadence Design Systems and Columbia University discuss the “return limited” inductance approach behind a full-chip RLCK modeler.
“Net-An,” a Full Three-Dimensional Parasitic Interconnect Distributed RLC Extractor for Large Full-Chip Applications. One of the first papers to discuss parasitic on-chip inductance effects, from the perspective of OEA International’s Net-An product.
Is Inductance Becoming Critical for Deep-Submicron Interconnect? This white paper describes how and why inductance can become a problem for deep-submicron designs.

Discrete Inductor : Introduction

If you are designing cmos inductor , you should know fundamentals of discete inductor also, image 1 image 2
The inductor is one of the greatest electronic component to enter the electronic field, it utilizes AC waveforms to reduce current, the more current the more induced resistance there will be in the circuit. Through this discussion you will earn how to calculate the affects on the circuit that the inductor has as well as calculating inductance in different setup situations. You will almost never see an inductor in a computer system but you will se them in power supplies for all sorts of household electronics. The inductor family
Here we have s set of five different inductors with distinct personalities. Inductor A is an inductor designed for high power environment, it has a ferrite core which gives it a greater inductance ability which makes it perfect for power supplies with a need for precise outputs. Inductor B is an air core inductor which offers little inductance in a circuit but does have a thick coil, this is a good example of something that you would find in a TV set or computer monitor. Inductor C is a device with an inductance rating specified on its outer rings. Although I will explain this inductor in much more detail later, you should also know what kind of devices you might find it in and why. Due to a thin coil and compact size, it is only suitable for such devices such as hand held radios and such devices with low power consumption. Inductor D is a device that has a variable core for precision tuning for such devices as radio frequency discriminating. As you might also have noticed, the coils are very thin few which means that the situation in where this device can be in are very limited. Inductor E on the other hand is built much like inductor D in the way that it has a variable core but the coil windings are much thicker and are able to withstand a greater amount of power. This device would be suitable for such devices like low consumption power-supplies.
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