Input-output balanced filter

Details Input-output balanced filter Input-output balanced filter

2006-09-26

2006-09-26

Tran, Sinh (Department: 2615)

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

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.

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