Mike Donnelly's picture

Automotive Start-Stop … Keep the...

You’ve probably noticed when you start your car that some of the optional electronics turn off, such as the radio and some LED lighting circuits. That’s because the high current draw of the starter motor pulls the system voltage far below the normal 12+ volt operating level. Critical circuits are designed to operate at these low voltages … if the ignition circuit didn’t work, you would be cranking for a very long time! But many functions are not designed for that low-voltage condition. After all, it’s a once-per-trip occurrence, and drivers expect the drop-out behavior.

Mike Donnelly's picture

Get the Heat Out! … Electro...

We have recently added a number of new electro-thermal models to our Component Library. These models represent devices that are either temperature sensing/control elements, or electronic components that dissipate significant power and may require thermal analysis. These models include:

Mike Donnelly's picture

TDFS Part 3 – Impedance...

In this final installment of my series on TDFS (Time Domain Frequency Sweep) analysis, I’ll focus on measuring impedance vs. frequency. I’ll first demonstrate the method by showing the measurement of input impedance for a switching power converter. Then I’ll extend that method to analyze the “impedance stability” of a distributed power system. Power systems may include many DC to DC converters, some acting as sources and other as loads.

Craig Beebe's picture

The SystemVision® Cloud Import...

What Is This Import Tool You Speak Of?

It’s a plugin for Mentor PADS PCB tools that allows you to import the designs and components that you create here. There’s a great blog about it here. If you're a registered PADS user, you can upgrade your SystemVision® Cloud subscription here.

Mike Donnelly's picture

Is it a Wire or a Transmission...

Question: When is a wire or cable a transmission line?

Darrell's picture

Controlling Motors with the...

Do you struggle to understand how to use the Talon SRX controller effectively?  What is PID and PIDF?  How does feedback control work?  What is feed-forward control? How are values of P, I, D, & F determined? How is the new Talon SRX "motion profile" feature supposed to be used?  

If these are your questions, this blog is for you.  

Darrell's picture

Waveform Measurements Are Here!

Many of you have asked us to provide an easy way to analyze waveforms in SystemVision Cloud.  Well, the wait is over!

Watch this short video to see what you can do with these new Waveform Analysis Tools.

Mike Donnelly's picture

TDFS Part 2 – Closed Loop...

Stability is an essential quality of most practical circuits and systems. A traditional stability metric for closed-loop control systems is gain and phase margin, based-on the open-loop transfer function (OLTF) or frequency response. A special physical measurement technique for obtaining the OLTF of an operating closed-loop system, pioneered by Dean Venable* in the 1980s, involves injecting a small sinusoidal stimulus in series with the loop, and measuring the absolute signal levels at the injection site.

Mike Donnelly's picture

TDFS Part 1 - Gain and Phase...

SystemVision Cloud provides a family of measurement models that perform “Time Domain Frequency Sweep” (TDFS) analysis. They measure the frequency response of many circuits and systems for which traditional “AC” or frequency-domain simulation is not possible. This includes:

Darrell's picture

Import Your SystemVision Cloud...

SystemVision Cloud is designed to work with the Mentor PADS PCB tools.  If you have the PADS PCB tools, you can install an import tool into the schematic capture environment.  Using this import tool, you can login with your SystemVision Cloud account, from within the schematic environment, browse for your online designs, and import them into a PADS schematic.  

For an overview of this capability, visit the SystemVision PADS AMS Cloud page.

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