Lots of things are still shorted.Therion said:those dotted lines are supposed to be ‘nets’ that indicate the actual wiring of the circuit, so yeah, your right, op amp 2 has been shorted!
That is how opamps work.How does changing the ratio between the resistors for gain
That is how filters work.effect the resistance you use for the Fc derision?
You had the 1nF capacitor in series with two 1k resistors. The resistors have a total resistance of 2k.I admit I am unsure how you got 2k resistance value for the HPF circuit?
[/quote]Any advice on how could I combat the opposing phase shifts in each filter circuit?[/quote]
Filters have phase shift. You can't change the phase shift of a filter.
Your new lowpass filter does not have the correct frequency response. Its cutoff frequency looks to be much lower than 15kHz.
The graph shows a huge signal loss, instead of the gain of 500 from the 3rd opamp.