FILTER CIRCUIT

PROBLEM TO BE SOLVED: To provide a filter circuit capable of correcting a tilt by the filter circuit itself without the need for arrangement of a circuit for tilt correction such as a tuning circuit. SOLUTION: The filter circuit includes: a ceramic filter 3 having a unique input impedance and a uniq...

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Bibliographische Detailangaben
1. Verfasser:	YAMAGATA YUICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a filter circuit capable of correcting a tilt by the filter circuit itself without the need for arrangement of a circuit for tilt correction such as a tuning circuit. SOLUTION: The filter circuit includes: a ceramic filter 3 having a unique input impedance and a unique output impedance; a first amplifier 1 connected to a pre-stage of the ceramic filter 3; a second amplifier 5 connected to a next-stage of the ceramic filter 3; a first coupling circuit 2 comprising an inductive element 2a or/and a capacitive element 2b interposed between the ceramic filter 3 and the first amplifier 1; and a second coupling circuit 4 comprising an inductive element 4a or/and a capacitive element 4b interposed between the ceramic filter 3 and the second amplifier 5. COPYRIGHT: (C)2004,JPO