LM741

[foTONICS]

I am designing a cascading low pass filter to stop frequencies around the 2kHz band. I don't mind if the filter response bleeds into the 3kHz band but I would like to make sure it doesn't go any further. Right now I'm using two LM741's but wondered if there were already IC's that had multiple 741's built into them.

-Any help is appreciated

 

[foTONICS]

go figure i would find something right after i post this

I found a LM148JAN. I assume if I only use 2 of the filters I should ground all other inputs?

 

[GreenGiant]

you dont have to touch any of the other pins, use the 2 that you need and the others wont do anything, connecting them to ground could potentially cause problems