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Understanding DC-coupled and DC-blocked power sensors and how your choice of sensor would impact measurement accuracy

Understanding power meter and sensor key specifications is vital for selecting the right equipment for power measurements. An often overlooked area is the DC or AC coupling characteristic of the power sensor. Choosing the wrong type of sensor can result in measurement inaccuracy and – or even worse, damage to the power sensor. This article compares the DC-coupled sensors to AC-coupled ones (also known as "DC-blocked" sensors). Several application examples are included to illustrate the key differences. The article concludes with choices of both DC-coupled and DC-blocked sensors from Agilent Technologies to suit the user's application requirements.

Beat the clock: System design and frequency management

Clocks are the 'heart beat' of almost all electronic systems and clock management is an especially important part of the overall system design. Since clock accuracy, stability and overall signal quality affect system performance, choosing the right timing solution that fits the design application is critical.

The world in your hand

Cambridge Consultants has helped Iridium evolve from a voice based satellite communications business to one based on data services.

I, robot?

Researchers are tackling the challenges of building truly humanoid robots.

Far from dead - VME is still alive and kicking.

When confronted with the question 'is VME dead?', what comes to mind is Mark Twain's famed response to his supposed demise – 'reports of its death are exaggerated'. VME, still the de facto open standard board architecture of choice for the embedded defence and aerospace market after 30 years, remains vital and healthy, both as a technology and as a 'culture' in the VITA Standards Organisation (VSO).

How multiple cores are improving data processing efficiency

Multiple cores on a chip is no longer deemed a novel way to boost computational performance. Chip firms recognise that using multiple cpus in parallel gives a better return than complex architectural tweaks to the cpu itself. By doing so, each elemental core can be tailored in terms of chip area and power consumption, especially when the core's clocking frequency is no longer the overriding concern.

Sensors - A clever touch

Driven by the influence of products such as the iPod, capacitive touch sensing is finding wider application and support. By Graham Pitcher.

Company profile – Bringing designers the world's most energy friendly microcontrollers

The explosion in the use of battery operated electronic products of the last few years has been followed more recently by the need for the battery to last longer for convenience, environmental and cost reasons. At the same time, applications have become increasingly complex and demand higher performance from the microcontroller, making the challenge of designing systems for low power even more difficult.

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