By using the state-space averaging approach, the converter's averaging model is presented, and the design criterion of key circuit parameters and the output characteristic curve are given.
采用状态空间平均法建立了变换器平均模型，获得了关键电路参数的设计准则和变换器的外特性曲线。
2
On the base of classic state-space averaging, this paper modifies and considers the parasitic effects of circuit elements which lead to equation of the state, so the small-signal model is established.
在电路平均法基础上对占空比限制加以改进，并考虑寄生参数的影响，推导出状态方程，建立其小信号模型。
3
An improved charge-averaging charge pump and the corresponding circuit implementation are presented.