sweet_nth
Newbie level 4
ok,, this might sound stupid, but i have the following situation,,,
i want to design a bandpass filter, and im using a general purpose op amp,
it looks just like the filter here
http://www.fulcrum.ru/Read/CDROMs/NS/OA-28.pdf#search='bandpass%20filter%20op%20amp'
the problem is when i power up the op amp in the filter, the output is always the same,, no matter what the input is(if any) !! its just giving my voltage a gain,, and nothing else, its not acting like a filter, my input is an audio signal, and im using the same power supply for the op amp, and the audio amplifier (input)..
what am i missing??? why isnt my circuit acting like a filter?? im using lm748 op amp..
i want to design a bandpass filter, and im using a general purpose op amp,
it looks just like the filter here
http://www.fulcrum.ru/Read/CDROMs/NS/OA-28.pdf#search='bandpass%20filter%20op%20amp'
the problem is when i power up the op amp in the filter, the output is always the same,, no matter what the input is(if any) !! its just giving my voltage a gain,, and nothing else, its not acting like a filter, my input is an audio signal, and im using the same power supply for the op amp, and the audio amplifier (input)..
what am i missing??? why isnt my circuit acting like a filter?? im using lm748 op amp..