| 摘要 |
A first high-frequency amplifier (4) having FETs is provided between a first high-frequency circuit part (2) and a mixer (7), a second high-frequency amplifier (5) having FETs is provided between a second high-frequency circuit part (3) and the mixer, and the first high-frequency amplifier (4) or the second high-frequency amplifier (5) is made alternatively operative, thereby switching the receiving band by the two high-frequency amplifiers. <IMAGE> |
