Differential voltage measurements

Thread Starter

watsongrey

Joined Oct 31, 2014
94
When would a technician take differential voltage measurements ?
For what kind of circuits would have differential inputs or outputs
 

joeyd999

Joined Jun 6, 2011
4,477
When would a technician take differential voltage measurements ?
For what kind of circuits would have differential inputs or outputs
Technically speaking, all voltage measurements are differential. "Single-ended" measurements are simply a differential measurement between some point and another referenced as 0V.

You are most likely referring to measurements that are made between two points, neither of which are considered a "common" or 0V.

Look up "Wheatstone Bridge" for an example of where differential measurements are important.
 

Thread Starter

watsongrey

Joined Oct 31, 2014
94
Making Differential voltage measurements that are not referenced to Zero or ground

Can you please give some examples of when a technician would measure a differential voltage that is not referenced to ground?
 

Thread Starter

watsongrey

Joined Oct 31, 2014
94
push pull amplifier
differential amplifier
the Voltage difference of a power supply resistor for heat dissipation
The voltage difference of a Series pass FET or Transistor in power supply
 
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