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Author Topic: The opamp buffer - Arrow Electronics style  (Read 4340 times)

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Offline BreakingOhmsLawTopic starter

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The opamp buffer - Arrow Electronics style
« on: October 12, 2023, 08:50:25 pm »
https://www.arrow.com/en/research-and-events/articles/fundamentals-of-op-amp-circuits

Comedy gold by Arrow Electronics.
"Students might become puzzled"
Ya think?

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Online SiliconWizard

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Re: The opamp buffer - Arrow Electronics style
« Reply #1 on: October 12, 2023, 09:22:21 pm »
Absolutely excellent! :-DD
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Online tszaboo

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Re: The opamp buffer - Arrow Electronics style
« Reply #2 on: October 12, 2023, 10:38:29 pm »
Silly Arrow. You should always connect the feedback to the + pin!
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Offline temperance

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Re: The opamp buffer - Arrow Electronics style
« Reply #3 on: October 12, 2023, 11:39:54 pm »
In our school for higher education we had a docent claiming that in an inverting amplifier all currents magically disappears into the inverting input because the other terminal is held at 0 V. So he consistently drew current arrows around such an amplifier pointing towards the inverting input.
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Online thm_w

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Re: The opamp buffer - Arrow Electronics style
« Reply #4 on: October 13, 2023, 12:31:54 am »
Why the hell are Vs and Ve used to label the input and output? Why not Vin and Vout..  :palm:
Super confusing.
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Offline newbrain

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Re: The opamp buffer - Arrow Electronics style
« Reply #5 on: October 13, 2023, 08:17:06 am »
Quote from: thm_w on October 13, 2023, 12:31:54 am
Why the hell are Vs and Ve used to label the input and output?
Probably from French entrée and sortie.
English is not the only language of this world, luckily.

This does not diminish or excuse the idiotic blunder.

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Online Kleinstein

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Re: The opamp buffer - Arrow Electronics style
« Reply #6 on: October 13, 2023, 09:53:53 am »
At least they did not connect the supply - so it may actually work in some cases.
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Offline BreakingOhmsLawTopic starter

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Re: The opamp buffer - Arrow Electronics style
« Reply #7 on: October 13, 2023, 10:26:31 am »
Quote from: newbrain on October 13, 2023, 08:17:06 am
Probably from French entrée and sortie.
The author apparently is a french marketing manager.
Let's hope he is better at marketing for Arrow's sake.
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Online SiliconWizard

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Re: The opamp buffer - Arrow Electronics style
« Reply #8 on: October 13, 2023, 07:16:52 pm »
Funnily, the example that follows with a resistive divider followed by an opamp buffer is correct, and the rest of the schematics in the article look correct as well.
So it's unclear what happened here.  ::)
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Offline TimFox

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Re: The opamp buffer - Arrow Electronics style
« Reply #9 on: October 13, 2023, 10:18:31 pm »
Quote from: newbrain on October 13, 2023, 08:17:06 am
Quote from: thm_w on October 13, 2023, 12:31:54 am
Why the hell are Vs and Ve used to label the input and output?
Probably from French entrée and sortie.
English is not the only language of this world, luckily.

This does not diminish or excuse the idiotic blunder.

Not to be confused with (English) "source" and "exit".
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Offline AlbertL

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Re: The opamp buffer - Arrow Electronics style
« Reply #10 on: October 14, 2023, 04:56:01 pm »
I remember an industrial products web site that had potentiometers listed under "Switches", in a sub-category titled "Variable-Output Switches".
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Online Warhawk

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Re: The opamp buffer - Arrow Electronics style
« Reply #11 on: October 14, 2023, 05:35:24 pm »
Quote from: temperance on October 12, 2023, 11:39:54 pm
In our school for higher education we had a docent claiming that in an inverting amplifier all currents magically disappears into the inverting input because the other terminal is held at 0 V. So he consistently drew current arrows around such an amplifier pointing towards the inverting input.

That's why he is a docent and not doing anything remotely close to practical engineering.
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Offline The Soulman

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Re: The opamp buffer - Arrow Electronics style
« Reply #12 on: October 14, 2023, 06:15:08 pm »
Quote from: tszaboo on October 12, 2023, 10:38:29 pm
Silly Arrow. You should always connect the feedback to the + pin!

Yeah, should send them a email with some negative feedback.
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