Patent ID: 7242271

Claim:
A SAW filter circuit comprising: a first circuit having, first to fourth connecting points, a first SAW resonator being electrically connected to said first and second connecting points, a second SAW resonator being electrically connected to said first and third connecting points, and a third SAW resonator being electrically connected to said second and fourth connecting points; and a second circuit having, a fifth connecting point being electrically connected to said third connecting point, a sixth connecting point being electrically connected to said fourth connecting point, seventh and eighth connecting points being electrically short-circuited, a first passive element comprising a capacitor and electrically connected to said fifth and sixth connecting points, the capacitance value of said first passive element contained within a range of 22 pF to 105 pF, a second passive element comprising an inductor and electrically connected to said fifth and seventh connecting points, the inductance value of said second passive element contained within a range of 0.2 nH to 1.0 nH, and a third passive element comprising an inductor and electrically connected to said sixth and eighth connecting points, the inductance value of said third passive element contained within a range of 0.2 nH to 0.6 nH.