How to chnage a passive bandpass filter to an active opamp bandpass filter?

[darrenbkl]

lm358 active filter design

Oh My F god.... i really hope i understand what you talking

 

[Audioguru]

lm324 phase inversion

Oh My F ---.... i really hope i understand what you talking

We are talking about the problems of lousy 40 years old opamps and much better ones that cost the same.

 

[LvW]

minimum supply voltage tl071

Oh My F ---.... i really hope i understand what you talking

Hi darrenbkl, besides this specific opamp discussion - what about your filter problem ?
Solved ?

 

[ivanljh]

high pass filter sp-hpf-50

Hi everyone. Im also having a similar problem on this topic. Im required to build a Passive BPF circuit and an active BPF circuit by combining a LPF and a HPF(shown below). What should I do? I have got no idea.
Specs:
1. fc1=41.3kHz, fc2=1.03kHz
2. Attenuation at 0.1fc1 and 10fc2 should be at least 10 dB.
3. Modify the passive cascaded filter with active device to have a passband gain of 0 dB with no phase inversion.


HPF

LPF

 

[darrenbkl]

tl071 passband filter

looks like you also from SP?

 

[ivanljh]

lm741 mfb bandpass filter

looks like you also from SP?

Yeah. Im stuck with this problem. Have you find out the solution for this? Mind sharing? =X