SAW FILTER AND ELECTRONIC DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To improve the filter characteristics of an SAW filter. SOLUTION: To achieve the above purpose, the SAW filter has at least two circuits in which two serial resonators 3, 4 are connected and a parallel resonator 7 is connected between a connection point thereof and a ground. These circuits are serially connected between an input terminal 1 and an output terminal 2, and a capacitance constituting member 11 is provided between the connection point of these circuits and the ground. COPYRIGHT: (C)2005,JPO&NCIPI