Filter for subscriber control system

H - Electricity – 03 – H

Patent

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350/20, 333/51

H03H 7/07 (2006.01) H03H 7/01 (2006.01) H03H 7/12 (2006.01) H04N 7/16 (2006.01) H04N 7/173 (2006.01)

Patent

CA 1216356

ABSTRACT OF THE DISCLOSURE A filter for use in a cable television system for filtering out a given channel comprising a two pole filter, said filter including one pole which is fixed at the center frequency to be tuned out and a second variable pole responsive to an input voltage, the second pole adapted to vary in frequency about the first pole.

437750

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