| 摘要 |
A balanced input-output piezoelectric filter includes a piezoelectric ceramic substrate provided therein with a ground electrode. Input electrodes and output electrodes are located on both major surfaces of the piezoelectric ceramic substrate so as to be adjacent to each other. The input electrodes function as a balanced-circuit connecting electrode and are connected to balanced input terminals. The output electrodes function as a balanced-circuit connecting electrode and are connected to balanced output terminals.
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