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What is the difference between Vcc- and ground? Answered

What is the difference between Vcc- and the ground symbol on this schematic? Or are they the same thing? I've just never encountered this before.

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Fixya (author)2012-09-25

Thanks you all for those info.

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Wickedweed (author)2011-04-07

Ground is relative. Imagine connecting two 9v batteries 'in' series and you make the joining point the ground. One pole of the battery will be +9v n the other will be -9v with reference to the ground

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orksecurity (author)2011-03-22

Another way to think of it: Ground is the reference point relative to which other voltages in the circuit are measured. Vcc- is negative relative to ground, Vcc+ is positive relative to ground. We usually call the ground "zero volts", to make the other measurements simpler.

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AndyGadget (author)2011-03-22

 
That's an amplifier which has positive and negative voltage rails, for example +12V and -12V, with reference to Gnd (0V).  The PSU to provide this is called a split-rail supply, which has a positive and a negative voltage regulator.

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frollard (author)AndyGadget2011-03-22

+1. Ground doesn't necessarily mean negative, just 'zero', capable of sourcing or sinking current.

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