The data sheet for the band reject, notch filter or TRAP is located at:
It appears to used in TV receivers and I suspect inside the unit is a series SHUNT C bridged input to output. The external inductor in parallel with the unit forms the band reject or TRAP frequency.
Their are probably 2 more additional shunt C's, one in parallel with the input and the other parallel to the output to signal ground. This all forms a conventional PI topology band reject filter.
Andrea, I will read your various notes and respond as time permits.
Regards, Alan
