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The most important electronics terms, demystified in one place.

Rail-to-Rail

Our Take

An op-amp typically has a positive and negative voltage supply and, by being rail-to-rail, the output of the op-amp can be all the way from the negative supply voltage to the positive supply voltage. Non rail-to-rail op-amps can only go within a few volts of the input supply.

Book Definition

Rail-to-rail means that the positive maximum is near the positive DC supply voltage and the negative maximum is near the negative DC supply voltage.

Electronic Devices : Conventional Current Version, 9th Edition by Thomas L. Floyd

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