Rail voltage

A voltage “rail” refers to a single voltage provided by the PSU (short for power supply – actually it stands for power supply unit). An ATX PSU has one 3.3 volt rail. It also has one 5 volt rail. The 3.3 volt rail has its own circuitry in the PSU which generates the voltage.

Rail to Rail Voltage Meaning???

Answer 1:

Rail = DC supply rail.

If the circuit operates with one supply rail and ground – then ground is
considered to be one of the rails.

Answer 2:

A “rail” here is a power supply. Rail-to-rail just means the full
range of voltages between the most positive and the most negative
power supply voltages present.

Most opamps, for example, if powered from +15 and -15 rails, can’t
make outputs that go all the way from +15 to -15… they usually lose
a volt or two on each end. A r-r-output opamp can output almost all
the way.

Simple Real time analogy for rail to rail voltage:

In Inter-Modal Transportation, Rail to Rail means a Bus, just like in
electronics. If I wished to travel by rail from City A to City B, I
might have to take the bus in order to resume Rail travel.

Inter-Modal Transportation Means

Inter-modal means “involving two or more different modes of transport in conveying goods”.

Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation (rail, ship, and truck), without any handling of the freight itself when changing modes.

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