Capacitive coupling

"Coupling capacitor" redirects here. Not to be confused with Decoupling capacitor.
"DC blocking capacitor" redirects here. Not to be confused with Bypass capacitor.

Capacitive coupling is the transfer of energy within an electrical network or between distant networks by means of displacement current between circuit(s) nodes, induced by the electric field. This coupling can have an intentional or accidental effect.

Capacitive coupling from high-voltage power lines can light a lamp continuously at low intensity.
Capacitive coupling from high-voltage power lines can light a lamp continuously at low intensity.

In its simplest implementation, capacitive coupling is achieved by placing a capacitor between two nodes.[1] Where analysis of many points in a circuit is carried out, the capacitance at each point and between points can be described in a matrix form.

  1. ^ Joffe, Elya (2010). Grounds for Grounding:A Circuit to System Handbook. Wiley-IEEE. p. 277. ISBN 978-0-471-66008-8.