Unintentional capacitive coupling

658

09:15:54

The square wave (pulses) is coupled to the sine wave signal via a capacitor, resulting in a noisy output signal. 

Because a capacitor's voltage is proportional to the *rate of voltage change*, combining one with the rising- and falling-edges of a square wave results in voltage spikes. These are superimposed on the sine wave - typically an undesired affect.

Capacitive coupling can be reduced by decreasing input (signal) resistance or the capacitance coupling the pulses to the signal. 

published 9 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.