Low voltage differential signaling

LVDS is a differential signalling system, which means that it transmits two different voltages which are compared at the receiver. See Differential signalling for details. LVDS uses the difference in voltage between two wires to signal information. The transmitter injects a small current, nominally 3.5 milliamperes, into one wire or the other, depending on the logic level to be sent. The current passes through a resistor of about 100 to 120 ohms (matched to the characteristic impedance of the cable) at the receiving end, then r ...

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Low voltage differential signaling, Low voltage differential signaling - Differential vs. single-ended signalling, Low voltage differential signaling - Applications, Low voltage differential signaling - SerDes, Low voltage differential signaling - Bus LVDS, Low voltage differential signaling - SCI-LVD, Low voltage differential signaling - Standards

Read more here: » Low voltage differential signaling: Encyclopedia II - Low voltage differential signaling - Differential vs. single-ended signalling

A differential signalling system is unlike the more common technique of single-ended signalling, in which the transmitter generates a single voltage that the receiver compares with a fixed reference voltage, both relative to a common ground connection shared by both ends. The widely used RS-232 system is an example of single-ended signalling, which uses ±12 V to represent a signal, and anything less than ±3 V to represent the lack of a signal. The high voltage levels give the signals some immunity from noise, since few naturally occ ...

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Differential signaling, Differential signaling - Differential vs. single-ended signalling

Read more here: » Differential signaling: Encyclopedia II - Differential signaling - Differential vs. single-ended signalling

See also balance, equilibrium. In electronics, a balanced signal is one that is expressed as the difference between two conductors, as opposed to an unbalanced signal that is expressed as the difference between one conductor and a reference earth. Low voltage differential signaling, twin-lead and standard low-impedance microphone cables are all examples of balanced signals. In all three of these applications, noise in a cable run is reduced by the fact that most of the noise is picked up equally by both conductors, and so the signal expressed as the difference between the ...

Read more here: » Balanced: Encyclopedia - Balanced

Some people claim that low power "smart" radio is inherently superior to standard broadcast radio, although others dispute this claim. "Technologists are increasingly discussing a related kind of gain called 'cooperation gain.' ... think about a party. If I need to tell you that it's time to leave, I could choose to shout that message across the room. Shouting, however, is rude. So instead, imagine I choose to whisper my message to the person standing next to me, and he whispered it to the next person, and she to the next person, and ...

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Low-power, Low-power - Low-power radio, Low-power - Low power consumption electronics

Read more here: » Low-power: Encyclopedia II - Low-power - Low-power radio

LVDS only became popular in the latter half of the 1990s. Prior to that point it could signal faster than the computers it was running in, and the need to run twice as many wires for the same amount of data outweighed the speed benefits. Yet multimedia and supercomputer users, both of whom needed to move large amounts of data over links several meters long (from a disk drive to a workstation, for instance) maintained a widespread interest in LVDS. Two examples of LVDS use in computer buses come from HyperTransport and FireWire, both o ...

See also:

Low voltage differential signaling, Low voltage differential signaling - Differential vs. single-ended signalling, Low voltage differential signaling - Applications, Low voltage differential signaling - SerDes, Low voltage differential signaling - Bus LVDS, Low voltage differential signaling - SCI-LVD, Low voltage differential signaling - Standards

Read more here: » Low voltage differential signaling: Encyclopedia II - Low voltage differential signaling - Applications