Unsourced material may be challenged and removed. In a typical implementation, the transmitter injects a constant current of 3. The receiver senses the polarity of this voltage to determine the logic level. As long as there is tight electric- and magnetic-field coupling between the two wires, LVDS reduces introduction to low voltage systems pdf generation of electromagnetic noise.
This noise reduction is due to the equal and opposite current flow in the two wires creating equal and opposite electromagnetic fields that tend to cancel each other. In addition, the tightly coupled transmission wires will reduce susceptibility to electromagnetic noise interference because the noise will equally affect each wire and appear as a common-mode noise. The LVDS receiver is unaffected by common mode noise because it senses the differential voltage, which is not affected by common mode voltage changes. 2 V allows using LVDS with a wide range of integrated circuits with power supply voltages down to 2.