What is difference between offset and gain in electronics?
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Input offset current is a fancy name for
the difference in input currents between
the two inputs. Unlike input bias current,
Input current the offset current, I,,, is a result of man-
ufacturing variations, since an op-amp's
symmetrical input circuit would otherwise
result in identical bias currents at the two
inputs. The significance is that even when
it is driven by identical source impedances,
the op-amp will see unequal voltage drops
and hence a difference voltage between its
inputs. You will see shortly how this influences
design.
the difference in input currents between
the two inputs. Unlike input bias current,
Input current the offset current, I,,, is a result of man-
ufacturing variations, since an op-amp's
symmetrical input circuit would otherwise
result in identical bias currents at the two
inputs. The significance is that even when
it is driven by identical source impedances,
the op-amp will see unequal voltage drops
and hence a difference voltage between its
inputs. You will see shortly how this influences
design.
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