What does this schematic symbol mean?
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peteey
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Also related: http://electronics.stackexchange.com/questions/38536/what-does-this-circuit-symbol-mean-circle-with-horizontal-line-through-it – dim Jul 21 '16 at 20:53
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This is a current source symbol.
It provides a constant current (whose value should be written next to the symbol), whatever the voltage across it. And basically, it's the opposite of a constant voltage source (ideal power supply).
Its meaning is not different from the usual symbol with a single circle.
Here are different symbols for current source:
Source: https://commons.wikimedia.org/wiki/File:Ideal_current_source_symbols.svg
They all mean the same.
- a is the usual US symbol.
- b is a variant of a.
- c is the DIN40700 symbol (german).
- d is the usual european symbol.
- e never saw that one before today, actually.
Your specific symbol is actually a mix of a and d. Half-US, half-european. A "melting pot" symbol, somehow.

dim
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