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Thread: Let's amp up the discussion on OpAmps (Operational Amplifiers) and how they work

  1. #21
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    I've used OP_AMPS that need to warm up.



    Steve
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  2. #22
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    Quote Originally Posted by mixedgas View Post
    I've used OP_AMPS that need to warm up.

    Steve
    Now that is awesome. Someone long ago, in a land far, far away once told me these existed.

    Thanks for the attachment, mixedgas! This is pretty darn cool. EDIT: I think I even have some 12AX7A tubes.
    Last edited by lasermaster1977; 02-15-2023 at 11:22.
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    An historical perspective of this sort on the analog multiplier could prove interesting.

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    I'm surprised Dean hasn't commented on this thread. He knows all kinds of stuff about op-amps. Whenever I needed a schematic for something, I asked him. In high school he made his own phono preamp with the RIAA equalization and a headphone amp. He made a really nice electric guitar preamp for me, that can do stereo (a pickup in each channel) that has a high input impedance to avoid the high frequency roll-off that would otherwise be caused by the inductive reactance of the pickup coils.
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    If those are multipliers be fun to implement a tube based geometric corrector. That would look wild. Be practically useless due to slew rate but interesting.

  6. #26
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    Oh, I don't know if it is such a problem... Seems GAP and his team solved that one too..

    Depends where the breakpoints in the diode array are located.

    A feller could have himself a pretty good time in Vegas with these:

    http://www.philbrickarchive.org/k3_s...components.htm

    The theory was known:

    http://www.philbrickarchive.org/wide...multiplier.pdf

    Mask defined math using electron beams.

    https://www.radiomuseum.org/forum/ge...nd_qk_256.html

    Steve
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    Last edited by mixedgas; 02-16-2023 at 15:43.
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    .....................

  8. #28
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    Hey Hank, I'm from Ohio, can I get a raw copy of that picture? Note the Swallow-Tail Burgee on the Astronauts' shoulder... That is the State Flag of Ohio

    I can have some fun with that at work...

    LMAO

    Steve
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  9. #29
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    Sure.. here's why he has an Ohio state flag on his arm: https://knowyourmeme.com/memes/wait-...lways-has-been

    And here are some meme generators:
    https://www.kapwing.com/studio/editor
    https://imgflip.com/memegenerator/Always-Has-Been

  10. #30
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    Quote Originally Posted by mixedgas View Post
    That is the State Flag of Ohio

    Steve
    Ha! That is funny. I didn't notice that.
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