| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption consumed in a power supply voltage boosting circuit in a slave set of the cordless modem repeater system, even in the standby state. SOLUTION: The system is made up of a set of a slave set 21 that is connected to a line with a modem and a master set 25, the slave set 21 is provided with a battery 11 and a power supply voltage booster circuit 13 that boosts the voltage of the battery and supplies power to the modem, a current detection circuit 17 detecting a current to the modem and with a supply power switching device 12 controlled by a CPU 20. In this case, the battery 11 supplies power directly to the modem in the standby state, the supply power switching device 12 shuts power supply to the power supply voltage boosting circuit 13, and the supply power switching device 12 is used to supply power to the power supply voltage boosting circuit 13 in the case of communication by the modem. |
