Abstract: The solution dynamic circuit impulse response initial value and dynamic circuit response initial value another simple method are given. After switching, the original state of circuit capacity voltage or circuit inductance current hasn＇t the jump normally, but sometimes there can be the jump. When it hard to determine for a while, the circuit may be changed into its s -domain model firstly, then the 0- value has been taken into the switched circuit model, lastly the Laplace transform＇s initial value theorem was applied, which solved the t - domain response original state 0 ＋ value problem in the s -domain. This method is applicable to various circuits extensively.

Key words: impulse response, initial value, jump, s -domain model