You are asked to set off from any piece of the lands and pass through all the seven bridges under the condition that each bridge can be used only once, so that you can finally return to the starting point

We define transfer function H(s) as a ratio of the Laplace transform of system output (or response)(s) to the Laplace transform of the input(or forcing function)v(s) when all initial conditions are zero, then

When initial energy is present in a circuit, the Laplace transform method may be used to obtain the complete response. The first is the more fundamental, for it involves writing the differential equations for the network and then taking the Laplace transform of those equations

15-6 The partial-fraction-expansion method

15-5 Several basis theorems for the Laplace transform 1.The linearity theorem{fi(t)+()}=()+(s) Example:

15-4 Laplace transform of some simple time function 1. The unit step function

When x(t), the input to N, is known, and when h(t),the impulse response of N, is known, the y(t), the output or response function, is expressed by

The two-sided or bilateral Laplace transform The one-sided Laplace transform or direct Laplace transform

§15.4 静态工作点稳定的放大电路 §15.5 射极输出器 §15.6 差分放大电路 §15.7 功率放大电路

14-8 Definition of the Fourier transform The exponential form of the Fourier series