If stray inductance and capacitance (which may or may not be stray) in a circuit should form a tuned circuit then that tuned circuit may be excited by signals in the circuit and ring at its resonant frequency.

• 如果电路中的电感和电容（含分布电感、分布电容）形成了谐振电路，那么在电路中信号的激励下，这个谐振电路就会在其固有谐振频率处产生“振铃”现象。