System, method and apparatus for providing ground separation between different environments
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United States of America Patent
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Mar 13, 2007
Grant Date -
May 18, 2006
app pub date -
Nov 15, 2004
filing date -
Nov 15, 2004
priority date (Note) -
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Abstract
In one embodiment, ground separation is provided between first and second grounded environments by configuring first and second op-amps of the second grounded environment as buffers, configuring a third op-amp of the second grounded environment to output a difference of its inputs, and coupling the inputs of the third op-amp to outputs of the first and second op-amps. A signal sensing input of each of the first and second op-amps is biased by 1) coupling the signal sensing input to a respective one of first and second impedances, and 2) coupling the first and second impedances to a ground of the first grounded environment. A signal from the first grounded environment is then provided to the signal sensing input of the first op-amp. Related apparatus is also disclosed.
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