| 摘要 |
PURPOSE:To provide a power consumption reducing means to a portable telephone set which performs the talking with another telephone set with use of the radio signals. CONSTITUTION:When the identification code assigned to its own side is detected out of the received radio signal, a pocket bell circuit 10 sends a control signal (a) to a drive switch 11. The switch 11 forcibly drives a power circuit 31 based on the signal (a) and actuates a telephone set part 30. The circuit 10 uses a solar battery and is always kept in an ON state. Thus it is not required to always keep a portable telephone set in an ON state and therefore the power consumption is suppressed. In a transmission mode, a power supply can be menually turned on. |
