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"OFFSET Voltage is the voltage you don't want it appear on your signal.Cause Its appearance make your signal not right as you expert. But the shape of your do not change.OFSET voltage is usually DC voltage. EX : if you need Sin signal but the signal which u receive is 1+4*sinwt Hence,1 VDC is the Ofset valtage. Or If you need 5 VDC out put from your IC OPAMP but the level voltage you receive only 4.5volt,since that OPAMP have 0.5 OFFSET voltage.hope it helpfull to u
For Op Amps and many other electronic devices, it is the input voltage that must be applied in order to force the output to 0. In this context, the proper term would be "input offset voltage". Ideally the input offset voltage is zero.
offset is the difference between the signal that we use and signal that the system sees.... for example you give a 10V input to a amplifier, but the system would see something less or more if there are stored charges or someother factor say the system sees 9.9V as input then .1V is the offset...