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Old 2nd October 2003, 12:28 PM   #1
jackinnj is offline jackinnj  United States
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Default New Tex Instruments op amp utilities

the Fourth Quarter edition of "Analog Applications Journal" is out from Texas Instruments.

There is a good article (actually there are a couple good articles) but the one I found almost humorous was that describing the wrong way of attenuating a signal with an op amp -- in fact the attenuators turn into oscillators by making Rg>>Rf, TI has an interactive inverting opamp attenuator webtool on their website.:

http://focus.ti.com/analog/docs/arti...rticleType=brc
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Old 2nd October 2003, 01:03 PM   #2
weeghel is offline weeghel  Netherlands
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OMG, that page is brilliant!!!

I had been calculating a resistor divider just yesterday. And I had planned to make something in excel to make it easier for the future. But they have a complete java calculator online for this purpose
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Old 2nd October 2003, 01:31 PM   #3
peranders is offline peranders  Sweden
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Those passive calculators were cool. Very usefull when you want to "tweak" in resistor values.
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Old 2nd October 2003, 01:54 PM   #4
jackinnj is offline jackinnj  United States
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Default Tweak

this is a tweak:
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File Type: jpg tweak.jpg (33.8 KB, 534 views)
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Old 2nd October 2003, 02:07 PM   #5
peranders is offline peranders  Sweden
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OK, "pre-tweak" then

According to my dictionary tweak means, twist, pinch, pull (fast)....
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Old 2nd October 2003, 03:53 PM   #6
Fred Dieckmann is offline Fred Dieckmann  United States
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Smile Not to tweak your nose, but........

"this is a tweak:"


I thought that was called a kluge.
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Old 2nd October 2003, 05:20 PM   #7
jackinnj is offline jackinnj  United States
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Default Is Fred correct?

the "offset" just needed a few more millivolts (you know those aging instrumentation IC's)

so it's definitely not a POOGE, and it is certainly inelegant, but I think that a KLUGE would refer more to an entire device cobbled together from disparate sources with half-baked ideas.

Somewhere around here I have a picture of a KLUGE.
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Old 25th February 2004, 04:52 PM   #8
jackinnj is offline jackinnj  United States
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new TI Analog Applications Journal is out:
http://focus.ti.com/lit/an/slyt053/slyt053.pdf
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Old 25th February 2004, 05:02 PM   #9
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Kluge?


Click the image to open in full size.
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Old 25th February 2004, 08:30 PM   #10
jackinnj is offline jackinnj  United States
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Default KLUGE

here's a ham-fisted KLUGE of mine, but it works quite nicely:
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