Push-pull fault

Differential mode interferences can occur in balanced and unbalanced circuits, namely when an unbalance generates push-pull voltages or push-pull currents.

Push-pull interferences are magnetically, electromagnetically or galvanically coupled to the circuit lines, superimposed on the actual useful signals, which they thereby impair. The propagation on the circuit lines is in the same direction as the useful signals.

Push-pull interference signals are caused by faulty grounding, asymmetries in circuits, incorrect conductor routing, non-twisted lines or signal conversions. Unlike common-mode interference, push-pull interference can be eliminated by circuitry measures, modified cable routing or other ground connections.