A Teaching Discussion of Small Signal Equivalent Circuit of the Triode Transistor;

Small signal analysis of the transit-time effect in the nonuniform three-cavity oscillator;

Relation expressions between input voltage / current and output voltage / current are given for stable working condition and small signal disturbance condition respectively,and the computer - based simulation is made under open loop condition.

The model can be easily implemented in circuit analysis program such as Simetrix to derive small-signal characteristics as well as predict large-signal transient behaviors of the converter.

This article uses the state-pace average method to get the small-signal model of active-clamp forward converter with peak-current control mode, then analyses the influence of the active-clamp circuit to the entire converter, finally present the design method of the compensate network.

This paper use sample-data modeling method to obtain the small-signal discrete model of HVDC,and convert it to a continuous model.

In this article ,first of all, we present the problem of identifying the little signal of the short railway,then analyse the char-acters of the FSK signal .