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Resolution of the voltage

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DimaKilani

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what does the resolution of the output voltage mean ? I read this expression multiple time in many references but I could not understand what does it mean exactly. Any one can explain it please ?

Thanks :)
 

Every Instrument(digital) has a parameter called resolution.Resolution is the parameter that gives us an idea about how accurate the measurement is being made.For example,if the digital device has a resolution of numeric value(say 0.01 V) in Volts.This means that the device can sense changes only greater than 0.01 V(resolution value specified in the manual),changes that are less than 0.01 V are rounded off to the nearest decimal place.For eg:


Actual Voltage:11.001 V Measured Voltage:11.00 V
Actual Voltage:11.004 V Measured Voltage:11.00 V
Hope this clarifies your doubt.
 

Resolution and accuracy are related, but are not the same thing. Accuracy cannot be better than the resolution, but the resolution can be better than the accuracy. Resolution refers to the smallest difference that can be detected by the instrument. A voltmeter with possible displays of 10.03 and 10.04 has a resolution of 0.01. But that voltmeter might not be that accurate. 10.03 on the display might really be 10.44 volts. Even though the absolute accuracy is not so good, the meter can still tell the difference between two voltages that are 0.01 volts apart.
 

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