| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter circuit which is excellent in a degree of steepness and a group delay characteristic, and composed by a small kinds of circuit structure elements. SOLUTION: The filter is provided with a total of 8 resonators K1 to K8 between an input terminal 11 and an output terminal 12. The input terminal 11 is connected to the end of the K1 and the end of the K2, their other ends are respectively connected to the resonators K3 and the K4, and other terminals of the K3 and the K4 are grounded. And, an end of the resonators K5 and K7 are connected to the connection node of the K1 and K3, and the end of the resonators K6 and K8 are connected to the connection node of the resonators K2 and K4. Furthermore, other ends of the resonators K5 and K6 are grounded, and other ends of the resonators K7 and K8 are connected to the output terminal 12. COPYRIGHT: (C)2006,JPO&NCIPI
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