funjoke
Member level 3
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• No ripple can exist in the output, but non-linear phase shift is allowed.
• The frequency response must be as close as possible to the ideal filter response.
• Signals of frequency 0 ~ 5 KHz are only allowed to pass through the filter with a desired gain of 4dB . Other frequencies should reduce at least 100 times of gain for every 10 times of frequency increase.
• capacitor of 0.01uF must use in the active filter design due to its high availability in the stock.
• Minimize offset error of your design
My answer:
no ripple means butterworth, 4 db means this is HPF
fc=1/2pie RC=7957OHM
Apb =4
20logApb=4
Apb-1.585
Rf=Rapb=7957 x 1.585 =12.6kohm
Apb=1+Rf/Rs
1.585=1/(12.6k/Rs)
Rs=21.54kohm
i just know this few steps .if there any mistake
• The frequency response must be as close as possible to the ideal filter response.
• Signals of frequency 0 ~ 5 KHz are only allowed to pass through the filter with a desired gain of 4dB . Other frequencies should reduce at least 100 times of gain for every 10 times of frequency increase.
• capacitor of 0.01uF must use in the active filter design due to its high availability in the stock.
• Minimize offset error of your design
My answer:
no ripple means butterworth, 4 db means this is HPF
fc=1/2pie RC=7957OHM
Apb =4
20logApb=4
Apb-1.585
Rf=Rapb=7957 x 1.585 =12.6kohm
Apb=1+Rf/Rs
1.585=1/(12.6k/Rs)
Rs=21.54kohm
i just know this few steps .if there any mistake