schematic for a 24db or steeper Bandpass filter????

[Martin Czech]

:::Is the attached schematic an appropriate design for high Q?
:::Would it be able to handle something in excess of 24db?

This is the standard multiple feedback filter. The cap to +
input is usually not shown, is this simply a noise killer or has
this to do with the bandwidth / Q problem of this structure?

pro: 

good passive component tolerance

con: 

op amp gain must be higher Q^2. E.g. Q=10 means G>100,
TL71 has about 3e6 Hz bandwidth gain product, means
300 @ 10kHz. This means problems with higher Q and high
frequency.

The final slope (far away from Q peak) for any bandpass
structure is -6dB/oct. Cascading 4 of them gives -24dB/oct.

Closer to the peak the slope is much steeper, I guess this is
what the Synton -54dB figure means.

m.c.