Ground Is a Cruel Joke Brandt Braswell 9/19/2014 3 comments Understanding grounding structures is important to help your circuits to work well and sometimes even to work at all. But ground is not always ground.
Should We Care if AM Radio Fades Out? Analog Angle 9/19/2014 12 comments How the cycle has turned: Putting an AM radio into a car was a big advance in the 1920s and 1930s; now, auto vendors are considering eliminating the radio as a standard or even optional feature, due to declining user need and listenership.
Stop Accepting Underperforming Start-Stop Systems Mike Everett 9/17/2014 1 comment Today’s energy storage and power delivery systems are not up to the task of start-stop engine cranking. The discerning public will soon demand the technology that is tailor-made for the application: ultracapacitors.
Time-Triggered Ethernet (TTE) Design Steve Taranovich 9/8/2014 8 comments The NASA Orion Spacecraft will have a strong fiber optic emphasis for its on-board data network. A Time-Triggered Ethernet distribution network is critical here.
The Power of Light Matthias Poppel 9/5/2014 16 comments EnOcean is partnering with the distributor Farnell element14 for a worldwide engineering design competition. Out of more than 200 applicants, 15 finalists were chosen; they are now challenged to develop an innovative monitoring and automation application.
Power Dissipation: My Arch-Nemesis Aubrey Kagan 9/3/2014 12 comments Experience should have taught Aubrey Kagan to consider power dissipation before introducing a component into a design. Unfortunately, it always seems to come back to bite him.
EMI Noise, Part 1: Don’t Be the Problem Edgardo Menendez 9/3/2014 3 comments Electromagnetic interference (EMI) is a problem in all electrical and electronic circuitry. This six-part series will discuss the available component solutions for mitigating EMI noise emissions and how to make your circuitry less susceptible to EMI.
Interfacing to ADCs: Power Supplies, Part 3 Jonathan Harris 8/26/2014 16 comments I thought it would be good to continue looking at the example I gave in my last blog where we looked using fewer LDOs and combining power supply rails on an ADC while maintaining isolation with ferrite beads.
Protecting Against Reverse Polarity: Which Method Is Right for You? Richard Chung 8/22/2014 17 comments Reverse polarity is a dangerous electrical condition that can be difficult to prevent once a system leaves the factory, so adding circuitry that protects against its effects is an important part of improving system reliability. This article looks at the many methods for protection and weighs their tradeoffs.
PWM DAC Design Dennis Feucht 8/15/2014 25 comments The question that arises in the design of a simple PWM DAC is what the low-pass filter pole frequency should be relative to the PWM frequency. This question is addressed by deriving the design equation.
Resistor Tech Brief 1 Steve Taranovich 8/15/2014 3 comments Here is our first "Ask the experts" tech brief in advance of our Resistor chat on Wednesday, August 20 at 1PM ET (10AM PT). I hope this stirs up some questions/comments for our chat.
Signal Chain Basics #92: The Insidious Claw Curve Signal Chain Basics 8/11/2014 1 comment Operational amplifier (op amp) datasheets normally have a long list of characterization curves. This list can be overwhelming to new engineers. One frequently misunderstood curve is nicknamed the "claw curve" because of its distinctive claw-like shape.
What Does Your Noise Nemesis Look Like? Analog Angle 8/6/2014 2 comments Noise in its many manifestations is ever-present in electronic circuit and systems designs. Engineers must understand the specific types of noise they are dealing with before they can effectively suppress and overcome it, via both analog and algorithmic techniques.
LEDs Are Photodiodes Too Steve Taranovich 8/5/2014 25 comments I read RAQ No. 45, "Glass Diodes May See the Light – and Hum," which discusses 100/120 Hz LF noise caused by a glass diode’s photosensitivity. I need a cheap photodetector, but a 1N4148 doesn't seem to work. How should I connect it?
Measuring an Alien World Steve Taranovich 7/30/2014 17 comments How do you measure and analyze a planet one-and-a-half times the size of Earth and 300 light years away? How can we know its composition? With the incredible technology of a cryogenic telescope like the Spitzer and Kepler Space Telescopes.
How the cycle has turned: Putting an AM radio into a car was a big advance in the 1920s and 1930s; now, auto vendors are considering eliminating the radio as a standard or even optional feature, due to declining user need and listenership.