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Avoiding Excessive Engineering – Top Ten Tips for Doing More with Less
Posted
7 months ago
by
Richard Zarr
Avoiding Excessive Engineering – Top Ten Tips...
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Tis the Season to Save Energy
Posted
5 months ago
by
Richard Zarr
In my never ending quest to lower our carbon footprint...
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Oh, That Interview Question— a reprise
Bruce Trump
10 02 2012 10:22 PM
After some Facebook chatter on last week’s blog , I think it deserves some follow-up. Here is the interview question that has bugged me for 41+ years: A 1V AC source is connected to a 1Ω resistor in series with a 1Ω reactance capacitor...
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SPICEing Op Amp Stability
Bruce Trump
09 10 2012 03:42 PM
SPICE is a useful tool to help check for potential circuit stability problems. Here is one simple way to do it: Figure 1 shows a non-inverting amplifier using the OPA211 with a couple of minor variations that are common in many applications. R3-C1...
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SPICE It Up! … but does Bob Pease say no?
Bruce Trump
08 21 2012 09:20 PM
August 22, 2012 Anyone who has read a few of my blogs has seen that I simulate circuits in SPICE. You may know that Bob Pease was pretty opinionated about SPICE and once wrote, “SPICE takes away your ability to get good insights on what is happening...
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Resistor Puzzle—the sequel
Bruce Trump
03 11 2013 10:18 PM
It’s time for some fun! I’ve known a few folks who have tormented colleagues with a resistor cube—equal resistors on all sides. So in case you’ve solved that one, let’s add a twist. In this cube, not all the resistors are...
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Paralleling Op Amps—is it possible?
Bruce Trump
03 26 2013 07:59 AM
Is it possible to parallel two op amps to get twice the output current? We get this question periodically on our E2E forums. Though we may answer with a qualified “yes,” it tends to make us shudder just a bit. It can be done… but...
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Resistor Puzzle Solution... and a rant on schematics
Bruce Trump
03 18 2013 08:33 PM
Did you see last week’s resistor puzzle? Check it out if you missed it . Here’s the solution: We’re not accustomed to reading three-dimensional schematics so the first step is to redraw it clearly. There are three distinct paths from...
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Taming the Oscillating Op Amp
Bruce Trump
05 30 2012 09:23 AM
Last week we looked at two very common reasons for oscillations or instability in op amp circuits. The ultimate cause of both was delay or phase shift in the feedback path. Review it here . I confess that I had intended to discuss cures for both circuits...
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Honoring an Analog Giant
Bruce Trump
06 19 2012 12:27 PM
Bob Pease died a year ago yesterday. What a loss for us analog heads who struggle to make our circuits work. His wealth of knowledge and experience seemed limitless. His insight and intuitive explanations helped so many engineers understand their circuits...
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Breadboarding with Micro-Packages—Ouch!
Bruce Trump
12 17 2012 06:50 PM
Have you noticed?...it’s rare to find new generation op amps and other ICs in DIPs (dual-inline packages). Without volume demand, it’s not economically viable to offer new ICs in DIPs. Breadboarding with these newer fine-pitch micro-packages...
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PCB Layout Tricks—striped capacitors and more
Bruce Trump
12 10 2012 07:42 PM
I posed a question a couple of weeks ago regarding film capacitors—what’s the meaning of the stripe on one end? Check the picture below. These are non-polarized capacitors so it’s not a polarity marking. A reader, Richard, answered...
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