Patent ID: 8289106
Filing Date: 2012-10-16
Classification: H03H

Abstract:
1. An acoustic wave device comprising: a piezoelectric substrate; at least five IDTs (InterDigital Transducers) arranged on the substrate in directions of SAW (Surface Acoustic Wave) propagation; and two balanced terminals connected to two first IDTs that are two out of the at least five IDTs and are 180 degrees out of phase, one of a pair of comb electrodes of one of the two first IDTs being connected to one of the two balanced terminals, and one of a pair of comb electrodes of the other one of the two first IDTs being connected to the other one of the two balanced terminals, the other comb electrodes of the two first IDTs being connected in series, and one of a pair of comb electrodes that form an IDT that is included in the at least five IDTs and is not connected to the two first IDTs being grounded, and additional balanced terminals connected to comb electrodes that are not grounded and are included in at least two second IDTs that are included in the at least five IDTs and are not connected to the two first IDTs, wherein the two first IDTs are not adjacent to each other.