Input-output balanced filter

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Reexamination Certificate

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Details

C333S175000, C333S202000

Reexamination Certificate

active

07113588

ABSTRACT:
An input-output balanced filter has a greatly reduced size and excellent stable electric characteristics. The input-output balanced filter includes two LC bandpass filter circuit units. A first LC bandpass filter circuit unit has a circuit structure in which a first LC parallel resonant circuit including an inductor and a capacitor is connected to a second LC parallel resonant circuit including an inductor and a capacitor via a connecting capacitor, while the second LC bandpass filter circuit unit has a circuit structure in which a third LC parallel resonant circuit including an inductor and a capacitor is connected to a fourth LC parallel resonant circuit including an inductor and a capacitor via the other connecting capacitor; and, the common side lines of the two LC bandpass filter circuit units are connected to each other via a connecting inductor which functions as a common line.

REFERENCES:
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patent: 08-018375 (1996-01-01), None

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