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555 Timer with filter

Acartare

Mar 22, 2016
4
Joined
Mar 22, 2016
Messages
4
Hi guys!

Could anyone help me out creating the 555 timer with a second-order cascaded bandpass filter? i'm trying to create it and simulate it on multisim and then on a breadboard.
upload_2016-3-22_11-53-5.png

I'm a bit confused of where to start..

Frequency 12khz
Duty cycle should be 90-12 / 2 = 39%

Cheers!
 
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