http://www.fileden.com/files/2007/9/3/1405069/circuit.gif
Just a quick question about this circuit I designed.
The big idea is to take an audio signal, put it through second order low-pass and second order high-pass passive filters so that it's rolled off at 40hz and 15000hz, and then split the signal so that it goes into:
1) a combo of 2nd order low- and high-pass filters rolling off at around 60hz and 125hz; and
2) a combo of 2nd order low- and high-pass filters rolling off at around 2000hz and 4000hz.
After this, the mixed signal from (1) and (2) goes through an op-amp IC in differential configuration to increase the loudness. The feedback and potential divider resistors going to the op-amp are potentiometers i.e. variable resistors.
Please check that the connections are correct, and that the resistances I worked out are correct for the frequencies I want to obtain. The only silver mica capacitors I can obtain are 150pF, so all the caps in this circuit have this capacitance.
Any other comments about the circuit vis a vis its chances of success are welcome. Thanks
Just a quick question about this circuit I designed.
The big idea is to take an audio signal, put it through second order low-pass and second order high-pass passive filters so that it's rolled off at 40hz and 15000hz, and then split the signal so that it goes into:
1) a combo of 2nd order low- and high-pass filters rolling off at around 60hz and 125hz; and
2) a combo of 2nd order low- and high-pass filters rolling off at around 2000hz and 4000hz.
After this, the mixed signal from (1) and (2) goes through an op-amp IC in differential configuration to increase the loudness. The feedback and potential divider resistors going to the op-amp are potentiometers i.e. variable resistors.
Please check that the connections are correct, and that the resistances I worked out are correct for the frequencies I want to obtain. The only silver mica capacitors I can obtain are 150pF, so all the caps in this circuit have this capacitance.
Any other comments about the circuit vis a vis its chances of success are welcome. Thanks