Content posted in February 2016
National Engineers Week and National Public Radio (NPR)
Steve Taranovich 2/26/2016 Post a comment
Being an engineer/journalist and remembering my New York University student days at the Bronx, NY Heights campus from 1968-1972 when I became “socially aware”, I have had many experiences during my life when the choice to do what people, managers and others urged me to do something underhanded, sneaky or convenient and sometimes bordering on criminal, but my conscience and moral compass said otherwise.
Technique accurately calibrates multichannel bridge-sensor configuration
Nick Hains 2/22/2016 Post a comment
When a data acquisition system has a large number of slow- or moderate-speed sensors, it often makes sense to use a high channel-count multiplexer to minimize component footprint, cost and power. But if each of these sensors needs unique calibration (and they often do), this can cause difficulties in effectively using that multiplexer front end. By using a carefully defined algorithm, the calibration issue can be efficiently resolved.
Customized power amplifier for realizing tiny magnetic fields
Barbara Stumpp 2/19/2016 Post a comment
Whether for the direct measurement of brain waves or for the determination of neutron-torque, one needs a reliable degaussing of the magnetic shields in order to achieve the necessary low magnetic field strengths. A basis for this is a current-controlled HERO Power Precision Power Amplifier from Rohrer Mess- und Systemtechnik in Munich, tailored for the specific application
When Second Sources aren't
James Bryant 2/9/2016 9 comments
We have been manufacturing a system using an Analog Devices' component for many years. Recently our purchasing department bought a consignment of cheaper replacement devices from another company and the whole batch of systems using them failed to work. Every specification on their data sheet is the same as ADI's, and when we test them they are well within those specifications. What is happening?
Components and Methods for Current Measurement
Bryan Yarborough 2/1/2016 3 comments
Current sensing is used to perform two essential circuit functions. First, it measures “how much” current is flowing in a circuit; information that may be used for power management in a DC/DC power supply to determine essential peripheral loads to conserve power. The second function is to determine when there is “too much” current, or a fault condition.
There’s a further cool thing you can do with a spreadsheet that most SPICEs can’t. That’s to use the spreadsheet ‘solver’ functionality to adjust component values in the search for a better-fitting circuit – or even to find a set of component values for a circuit you can’t otherwise design.
Infineon MOSFETs have been embedded into PC boards by Schweizer Electronic AG
You now need to adjust component values to achieve some system goal, such as predefined frequency response or time behaviour, and there’s no closed method for working out those values.
As a member of the electronics design community, I am angry and disappointed with the recent deaths of 346 people due to the Boeing MAX 8 design
The theoretical advantages of GaN-based power transistors are now being realized in mainstream system designs. Power supplies for data centers and telecom switching racks are two application areas where GaN transistors show significant improvement in comparison to systems using best-in-class Silicon-based Superjunction devices.