Differential voltage measurements

Discussion in 'General Electronics Chat' started by watsongrey, Nov 2, 2014.

  1. watsongrey

    Thread Starter Member

    Oct 31, 2014
    94
    0
    When would a technician take differential voltage measurements ?
    For what kind of circuits would have differential inputs or outputs
     
  2. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    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.
     
  3. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    This must be homework. We saw the identical question a while back.
     
  4. watsongrey

    Thread Starter Member

    Oct 31, 2014
    94
    0
    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?
     
  5. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    Voltage across a resistor to estimate current.
    Voltage across a diode to check its integrity.
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,163
    1,796
    Output of a differential driver, or the input of a differential receiver
     
  7. watsongrey

    Thread Starter Member

    Oct 31, 2014
    94
    0
    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
     
Loading...