| 摘要 |
PROBLEM TO BE SOLVED: To efficiently suppress power consumption without deteriorating transmission ability. SOLUTION: When the output level of a transmitter, which is obtained at the time of transmission, is a level that a power amplifier 6 requires, by using a power amplifier 6 having the switching function of a signal route, a system is switched to a route A through switch circuits 14 and 15. When the level is a level that the power amplifier 6 is not required, the system is switched to a route B through the switch circuits 14 and 15 and the supply of power by a power source circuit 13 is stopped. Thus, power consumption when the output level of the transmitter is low can efficiently be suppressed without deteriorating transmission ability. |
