对比方案赛+SallenKeyButterworth10KhzLPF

jasonheeeeee

对比方案赛+SallenKeyButterworth10KhzLPF [复制链接]

Required:

Cutoff Frequency:  10Khz,

Stop band Frequency: 50Khz,

The minimum stop-band attenuation : -45dB;

The maximum pass-band attenuation: -25dB;

Step1:
Step2:

Step3:

Run simulation for step2’s schematic by Matlab .M code :

function vargarout = ButterWorthLPF10KHz(varargin)

clc;

syms R1_S1 R2_S1 C1_S1 C2_S1 R1_S2 R2_S2 C1_S2 C2_S2 S

Z1S1 = R1_S1 + R2_S1*(1/(S*C2_S1))/(R2_S1 + (1/(S*C2_S1)));

Z2S1 = 1/(S*C1_S1);

TRS1 = Z2S1/(Z1S1 + Z2S1);

Z1S2 = R1_S2 + R2_S2*(1/(S*C2_S2))/(R2_S2 + (1/(S*C2_S2)));

Z2S2 = 1/(S*C1_S2);

TRS2 = Z2S2/(Z1S2 + Z2S2);

TR = TRS1*TRS2;

TRN = subs(TR,[R1_S1 R2_S1 C1_S1 C2_S1 R1_S2 R2_S2 C1_S2C2_S2],...

    [11300 154009.1*10^(-9) 12*10^(-9) 3830 7150 9.1*10^(-9) 82*10^(-9)]);

[Num Den] = numden(TRN);

Nump = sym2poly(Num);

Denp = sym2poly(Den);

bode(tf(Nump,Denp));

end

The Bode chart show that our design can really meet ourinitial  spec ,and it’s really veryconvenient for us, engineers, to implement the Filter Design by Webench . andthis tool is also very precious although it’s an online design tool.

maylove

对比方案体现在什么地方呢？