| 摘要 |
A portable telephone set controls the amplification factor of an amplifier to control the transmission power of the portable telephone set based on a control signal transmitted from the base station. If the control signal transmitted from the base station controls the transmission power so as to be equal to or smaller than a predetermined level, then a first switching means sets the amplifier to an ON-state. If the control signal transmitted from the base station controls the transmission power so as to be greater than the predetermined level, then the first switching means sets the amplifier to an OFF-state. While the amplifier is being set to the OFF-state by the first switching means, if the amplifier is set to the ON-state by a second switching means only when the user of the portable telephone set communicates via the portable telephone set, then the amplifier is in the ON-state only during the communication if the transmission power is controlled so as to exceed the predetermined level. |
