Posted Feb 10, 2012, by Mike Jensen
Welcome to the third installment in my Analog Modeling blog series. In Part 1 I wrote about why equations are important for simulation. In Part 2 I suggested a process flow for turning device equations into a simulation model, and introduced the basic structure of a VHDL-AMS model. Now it’s time to begin the model definition process. As I outlined in Part 2, the first step is deciding what you want … Read More
Tags:
HDL,
Mixed-Technology,
analog modeling,
System Modeling,
System Simulation,
Modeling,
Simulation
Posted Feb 2, 2012, by Mike Jensen
In Analog Modeling – Part 1 I reviewed the importance of equation selection in the analog modeling process. In a nutshell, the first step in getting good simulation results is choosing equations that best describe the behavior or device you want to analyze. Your analog equation set could be as simple as a single transfer function describing the relationship between the inputs and outputs of a … Read More
Tags:
HDL,
Modeling,
analog modeling,
System Simulation,
Simulation,
System Modeling
Posted Jan 25, 2012, by Mike Jensen
I recently spent some time rummaging around my basement. I suppose my basement is not unlike many others — it’s kind of my family’s catch-all storage place for items too big to fit in a closet. Besides housing my HVAC and water heating systems, my basement is home to a variety of holiday decorations, lots of canned, bottled, and bulk food items, a small collection of mismatched folding tables … Read More
Tags:
Modeling,
Simulation,
analog modeling,
VHDL-AMS,
System Modeling,
System Simulation
Posted Dec 2, 2011, by Mike Jensen
As engineers we often use “system” to describe different levels of design abstraction. Chip designers refer to integrated circuits as systems on chips. Audio designers refer to an amplifier as a system. Aircraft brake designers create systems for stopping aircraft. There truly are a variety of ways to define and implement a system. And most things we call a system are really just a subsystem … Read More
Tags:
System Modeling,
VHDL-AMS,
System Simulation,
Modeling,
Mixed-Technology,
SystemVision,
Automotive System Design
Posted Oct 12, 2011, by Mike Jensen
Once in awhile I work with customers who want to move VHDL-AMS models between multiple simulators. The ability to do so is one of the great promises of standard modeling languages and, at face value, should be an easy task. After all, if a language is an industry standard, and multiple simulation tools claim to support it, then moving models between tools should be a plug-and-play process, right? Well, … Read More
Tags:
Modeling,
Simulation,
IEEE 1076.1,
VHDL-AMS,
System Modeling,
System Simulation
Posted Aug 22, 2011, by Mike Jensen
One of the most important things I’ve learned during my 20+ years working with simulation tools is simply this: my simulation results will only be as good as my models. While not a revolutionary concept, it’s none the less a fact of system simulation that anyone using a simulator in their design process knows. But there is an equally important companion principle: my model will only give me the … Read More
Tags:
Mixed-Signal,
Mixed-Technology,
IEEE 1076.1,
System Simulation,
VHDL-AMS,
Modeling,
System Modeling
Posted May 16, 2011, by Mike Jensen
All EDA companies share a common business objective: convincing customers to buy their tools over the competition. Among other marketing tasks, we search for graphics that best express the value of our tools, graphics that customers can look at and immediately understand. Having worked on many charts and graphs myself over the years, I’ll admit it’s not an easy job to find or develop just the right … Read More
Tags:
System Modeling,
SystemVision,
Modeling,
Add new tag,
System Simulation
Posted Feb 7, 2011, by Mike Jensen
In May 2010 I wrote about a couple of personal transport projects in a post titled Segway to U3-X. Naturally, the Segway Personal Transport (PT) is in production with a variety of options and models. Honda’s U3-X, though cool and seemingly quite practical, as far as I know has yet to see a showroom floor. Perhaps the U3-X was just a platform for Honda’s engineers to research mobility possibilities. … Read More
Tags:
Modeling,
Simulation,
ideas
Posted Sep 3, 2010, by Mike Jensen
Admittedly, I’m a bit biased. After 20+ years in the EDA industry, I’ve developed increasing confidence in modern simulation technology. In short, I generally believe what SystemVision tells me about the systems I analyze. With the right models and simulation settings, I am confident my simulation results will closely match lab measurements on prototype hardware.
Part of building confidence is simply … Read More
Tags:
Mechatronic,
Modeling,
EDA,
SystemVision
Posted Jun 21, 2010, by Robin Bornoff
This final blog in this series focuses on what is sometimes the most ethereal of CFD modelling arts, where and how to define your peripheral boundary conditions. A fancy phrase but in reality no more than deciding where the interface is between what you model and what you don’t. Heat is contemptuous of such divisions, it will spread out from it’s source and keep on spreading via convection, conduction … Read More
Tags:
modelling,
boundary condition,
CFD,
BC,
Model,
Modeling,
Electronics Cooling,
FloTHERM
Jim Martens
Harry Foster
John Day
J VanDomelen
Paul Johnston
Dennis Brophy
Colin Walls
Travis Mikjaniec
Per Viklund