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-   -   Schematic symbol for ferrite bead? (http://www.diyaudio.com/forums/software-tools/161836-schematic-symbol-ferrite-bead.html)

peranders 22nd February 2010 02:22 PM

Schematic symbol for ferrite bead?
 
I'm looking for a symbol for ferrite beads. Is there a standard for it?

marce 22nd February 2010 04:26 PM

We use a standard inductor symbo, but marked for example '600R 100MHz' instead of its inductance, plus we use the name stem FB instead of L so the high speed router and SI dont class them as inductors.

c2cthomas 22nd February 2010 05:30 PM

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This should work - pretty easy one to draw too!! ;)

unclejed613 23rd February 2010 11:45 AM

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i've seen them drawn several different ways. one as a piece of wire with a square superimposed like the one above (most common) sometimes the square is greyed, but also as a circle superimposed. occasionally i see one drawn as a single loop as in an inductor symbol, sometimes with a bar above it (as in a ferrite core symbol), there are a few shown below that i have seen. remember schematic symbols are usually somewhat "descriptive" of the device, so there are usually some variations on the "standard" way to draw them. there are standard symbols, and there are variations of those standard symbols. it used to be the choice of whoever was drafting the schematic (or whatever symbol templates he had on hand). these days, it's the symbol library in the software (usually). unfortunately the first one can be confused with a fuse.

marce 23rd February 2010 11:45 AM

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Also found these (and other variations), so as usual no correlation between standards. My vote goes to c2cthomas and IEC 60617.

peranders 24th February 2010 03:53 AM

Thank you guys. :nod:


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