Test / Data Acq.
Building Test Applications At The GUI Level |
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Wednesday, 16 May 2007 |
Today’s PC-based test systems free engineers from much of the mundane task of programming at the hardware level or even at the software level. Applications are built by assembling tests with function libraries or connecting graphical blocks or objects together with wires dictating the program flow. The next-generation GUI builders, however, can virtually eliminate programming, freeing engineers to concentrate on test functionality rather than implementation details....more  (0) Comments |
HIL Simulation Boosts Automotive Design Efficiency |
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Monday, 14 May 2007 |
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Hardware-in-the-Loop simulation reduces development cost and increases the quality of a vehicle. The unit under test provides feedback for the simulation, and testing can take place early in the design cycle. Driven by governmental regulations and market demand for better fuel economy and greater performance, the design of modern automobiles and the process of developing them have changed. Pushed by these challenges, the automobile has evolved from a mostly mechanical-hydraulic system to include complex automotive electronics and software algorithms implemented on electronic control units (ECUs)....more (0) Comments |
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How To Test The Interconnections Between FPGAs On A High-Density FPGA-Based Board |
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Friday, 11 May 2007 |
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This article describes a simple, effective, and generic solution to check signal connectivity between FPGAs on a high density prototyping board with multiple FPGAs and hundreds of signals. High-density FPGA-based boards are widely being used for logic development and verification before taping out the actual IC. On a high-density FPGA-based board where multiple FPGAs are interconnected with hundreds of signals, checking and validating the interconnections between the FPGAs becomes a very challenging task. This article describes how challenging the problem is and also suggests a simple, effective, and generic solution to check the signal connectivity between the FPGAs. The method also helps the designer to identify and locate faults, if any, on the board which otherwise would have been a very cumbersome task. This article also proposes a method to efficiently generate the test code, most of which could be automated....more (0) Comments |
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A Practical Guide To Low Power Efficiency Measurements |
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Friday, 11 May 2007 |
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Find out how to make accurate low power mode measurements to get the highest efficiencies. Overall system efficiency is a critical design parameter in battery powered systems. It affects both the battery capacity requirement and the end product's run time. Proper system efficiency and run time calculations can be achieved only when the power supply's efficiency measurements are accurate. Most battery powered systems take advantage of a power supply feature called pulse frequency modulation (PFM) to improve power supply efficiency at light loads. The same characteristics that help PFM mode achieve high power supply efficiencies also create several challenges for properly measuring the efficiency....more (0) Comments |
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Tips And Tricks For Debugging Audio |
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Wednesday, 09 May 2007 |
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Are you designing a system that involves audio? Maybe an audio product, or a product with an audio subsystem? Here are some tips and tricks that may help you. Designing audio systems and debugging audio presents some interesting challenges. Sound is ruthlessly real-time; the speaker cone will keep moving, even if your prototype isn't able to keep up with the flow of output samples required. The same is true of a microphone: the microphone diaphragm keeps moving and must be sampled often enough. If you skip one or more samples at the input or the output, then a (very loud) click or pop can result. What's more vexing, the human auditory system, which is the final judge of audio quality, is extremely sensitive, especially to unexpected sounds (or artifacts) that your implementation may introduce....more (0) Comments |
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A How To Tutorial On Logic Analyzer Basics For Digital Design |
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Monday, 07 May 2007 |
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This tutorial provides an overview of logic analyzer basics; most logic analyzers are really two analyzers in one: a timing analyzer and a state analyzer. Let's assume that you need to simultaneously look at the inputs and outputs of a 16-bit counter to determine a timing error, but you have only a 2-channel scope – how do you look all of the required signals? Or let's suppose that you've just developed timing diagrams for a board full of digital circuitry. How do you verify them? What do you use to capture and analyze the signals on the board? Without the appropriate tool, solving these kinds of problems can be very time consuming. For the above problems, a logic analyzer is the best solution. This article provides a quick overview of logic analyzer basics and offers ideas as to what can be achieved using a logic analyzer....more (0) Comments |
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