用matlab算最简单了,如下:
>> syms R32 C43 L7 C44 L8 R33
>> syms s
>> RL=1/(1/R33+1/L8/s+C44*s)
>> Rin=R32+1/C43/S+L7*s
>> Hs=RL/(RL+Rin)
>> combine(Hs)
R33*L8*s^2*C43/(L7*s^4*C43*C44*R33*L8+(R32*C43*C44*R33*L8+L7*C43*L8)*s^3+(R33*L8*C43+R32*C43*L8+C44*R33*L8+L7*C43*R33)*s^2+(L8+R32*C43*R33)*s+R33) |