Why using negative voltage in vibration measurement?

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Why using negative voltage in vibration measurement?..

Answer / alok

bcoz we use npn typejunction whiuch taken o/p in negative
voltage.........if we use pnp type junctioin tyhen we use
positive voltage .its all depend upon ur transducers type.

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Why using negative voltage in vibration measurement?..

Answer / muslem

this question is better answered here by a specialest:
allinterview.com/showanswers/111934.html

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