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From IBIS2Spice
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Please Check back mid April 2008.
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Site Purpose
Our Purpose with this site is to aid you in designing your perfect circuit before you spend unnecessary money building a physical prototype. Our converter can give you the convenience and time savings you need to gain the edge to beat the competition by simulating your circuits and testing them before any physical work is implimented. This program will give you a much better insight on the robustness and integrity of your design. Our IBIS2SPICE system will enable you to use our converter to see how well your design will operate in the real world. This can be done by using our converter for the IBIS files and converting them into SPICE compatable files. In the following pages we will explain what IBIS and SPICE are and how they function independently. Then we will explain and show you how to use our converter and how much more useful the two are together and giving you a whole new world in simulation. Please read on for the detailed information to make engineering and designing circuitry much easier and faster then ever before. If you are looking for a way to blend IBIS and SPICE together? We are here to show you an easy step by step process to get you on your way. We will start off by explaining how IBIS functions and what its purpose is then the section after that we will talk about the funtionality and history of SPICE and finally we will explain how to use our converter to get you on your way to .
What is IBIS(Input Output Buffer Information Specification)
Better question "Why would I want to use IBIS?" 'IBIS according to Wikipedia is:'
- IBIS (Input Output Buffer Information Specification) is a method of providing information about the input/output buffers of an integrated circuit to the outside world. It is an EIA (Electronic Industries Alliance) standard. The idea of IBIS is to provide the behavioral aspects of a circuit without providing the actual circuit information to the user. The model is generated in text format and consists of a number of tables that captures Current vs. Voltage (IV) and Voltage vs. Time (Vt) characteristics of the buffer. IBIS models are generally used in lieu of SPICE models, to perform various board level signal integrity (SI) simulations and timing analyses.
Here is the link to the IBIS website. http://www.eigroup.org/ibis/ This will aid you in finding a particular chip you are looking for.
Here is the history:
- Intel initiated IBIS in the early 1990s.[1] Intel needed to have all of its divisions to present a common standardized model format to its external customers. This prompted Intel to solicit EDA vendors to participate in the development of a common model format. The first IBIS model, version 1.0, was aimed at describing CMOS circuits and TTL I/O buffers.
Why was IBIS created?
- As IBIS evolved with the participation of more companies and industry members, an IBIS Open Forum was created to promote the application of IBIS as a simulation tool format and to make sure that standards exists. Currently, over 15 semiconductor vendors support IBIS and over 8 EDA vendors develop software for IBIS. In 1995 the IBIS Open Forum teamed with the Electronic Industries Alliance (EIA). Since then the EIA/IBIS Open Forum oversaw all technical developments of IBIS. IBIS version 2.1 was the first version released by the new alliance. IBIS, version 2.1, has developed the ability to simulate ECL and PECL buffers as well as differential lines. The current version, IBIS 3.2, allows for a package model description along with an electrical board description.
Why would I want to use an IBIS file?
- IBIS files are a great tool for the closest simulation possible without actually building the circuit.
Examples:
-Mixed signal low frequency circuit simulation.-
-Explain digital and analog separation in industry software.-
example: Driving analog circuitry with a digital signal: 1. Driving a motor with a micro-controller through optical sensors. This could be used to convert an optical sensor signal to turn a motor on move a pallet down a conveyor and kick off the right line. You can build the circuitry up on a our simulator to look at the optimal design before investing in actual material.
External Links
http://en.wikipedia.org/wiki/Input_Output_Buffer_Information_Specification
What is SPICE()
http://bwrc.eecs.berkeley.edu/Classes/IcBook/SPICE/ SPICE is a general-purpose circuit simulation program for nonlinear dc, nonlinear transient, and linear ac analyses. Circuits may contain resistors, capacitors, inductors, mutual inductors, independent voltage and current sources, four types of dependent sources, lossless and lossy transmission lines (two separate implementations), switches, uniform distributed RC lines, and the five most common semiconductor devices: diodes, BJTs, JFETs, MESFETs, and MOSFETs. SPICE originates from the EECS Department of the University of California at Berkeley.
Misc.
Consult the User's Guide for information on using the wiki software.
