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How to create negative voltage source ?

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smiles

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I wonder it for a long time, just think it is some voltage value compared to mass ???
Could anyone give me clear explanation !!!
Thanks so much :)
 

A.Anand Srinivasan

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can you please make your question clear... i dont understand why you are involving mass here...
 

smiles

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Max232, I will remember it, but do you think that we can create it by another way, not by using ICs ?
 

castrader

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use switch-cap can easily generate negtive voltage reference.
 

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