| 摘要 |
PROBLEM TO BE SOLVED: To make the surface acoustic wave filter small-sized by reducing the mounting area of a circuit. SOLUTION: This surface acoustic wave filter 10 has an amplifying means 11, a surface acoustic wave filtering means 12, and a package 13. The amplifying means 11 amplifies an input signal and generates an amplified signal. The surface acoustic wave filtering means 12 extracts a signal of necessary frequency band from the amplified signal. The package 13 hermetically seals the connected amplifying means 11 and surface acoustic wave filtering means 12.
|
