Balanced lines with differential receivers will reject noise regardless of whether the signal is differential or single-ended, but since balanced line noise rejection requires a differential receiver anyway, differential signalling is often used on balanced lines. Since the receiving circuit only detects the difference between the wires, the technique resists compared to one conductor with an un-balanced reference (low-Ω connection to ground).Contrary to popular belief, differential signalling does not affect noise cancellation.

Contents.Advantages Provided that the source and receiver impedances in a circuit are equal (it is ), external electromagnetic interference tends to affect both conductors identically.

The opposite technique is called.Differential pairs are usually found on, in and, and in connectors. The values for the minimum and maximumoutput voltages that you provide must be consistent with the values for the supplyvoltages that you provide. Note that the negative supply voltage can be zero, which corresponds tooperation when a split supply is not available. If no current is drawn from thecm port by the external circuit, then the output voltage is setto be the average of the positive and negative supply voltages by the resistor ladder ofR3a and R3b. The voltages of thetwo output ports Vout+ and Vout- are both limitedto be within the minimum and maximum output voltages that you specify.The output voltage for zero differential input voltage is controlled by thecommon-mode port, cm. Similarly the slew rate of each of the voltagesources is set to half of the differential maximum slew rate value. The gain of the two voltage-controlled voltage sources (VCVS1 and VCVS2) is setto half of the differential gain value.

Parameters for the circuit components are derived from the block parameters that youprovide.

Differential output voltage