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Technical Note

Differential Oscilloscope
Measurements
A Primer on Differential Measurements,
Types of Amplifiers, Applications, and
Avoiding Common Errors
introduction of solid-state
gain circuits, high perfor-
mance voltmeters could be
isolated from ground, allow-
ing floating measurements to
be made.
Most oscilloscopes today,
like the venerable VTVM,
can only measure voltages
that are referenced to earth
ground, which is connected
to the scope chassis. These
are referred to as "single-
ended" measurements