What is the difference between Vcc- and ground?
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.
4
answers
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Answer it!
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Apr 7, 2011. 4:34 AMWickedweed
says:
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
Mar 22, 2011. 6:22 PMorksecurity
says:
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.
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.
+1. Ground doesn't necessarily mean negative, just 'zero', capable of sourcing or sinking current.
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