one more on filters ...

[Haible_Juergen#Tel2743]

>[1]    * 3080 to cap to buffer, (-) input grounded, no feedback
>[2]     * 3080 to cap to buffer, negative feedback from buffer into 3080
>[3]     * 3080 to (-) input of op-amp integrator

Another one:

3080 to (-) input of op-amp integrator, feedback from integrator to positive 
(!) input of 3080 would also make a Lag like [2]. Should work even with 
SSM2024's (which only have (+)-inputs and require a summing node at the 
output). But I haven't tested it.

JH.