초록 ▼

A portable radio telephone or transceiver in which power source control is effected to prevent cases in which the telephone cannot be used due to lack of battery charge, and is made up of: a voltage detector 1 that detects the voltage of a battery 2 and outputs battery voltage information 11; memory

A portable radio telephone or transceiver in which power source control is effected to prevent cases in which the telephone cannot be used due to lack of battery charge, and is made up of: a voltage detector 1 that detects the voltage of a battery 2 and outputs battery voltage information 11; memory 5 that stores voltage 51, which is a voltage at which the remaining charge of a battery is nearly exhausted, and voltage 521 higher than voltage 51, to enable the battery to operate the radio transceiver for at least one calling operation; key input detector 4 that detects the key input and outputs key input information 41; processor 3 which compares voltage 52 with battery voltage information 11 and outputs switch control signal 31 which operates to disconnect the battery from the main circuit when voltage information 11 is less than voltage 52; and switch 8 that disconnects the battery from main circuit 7 in accordance with switch control signal 31.

대표청구항 ▼

[ What is claimed is:] [1.] A power source control system of a portable radio transceiver comprising:a power source circuit including a battery;a main circuit operated by said battery;a detection circuit that detects the voltage of said battery;a switching means for selectively connecting and discon

[ What is claimed is:] [1.] A power source control system of a portable radio transceiver comprising:a power source circuit including a battery;a main circuit operated by said battery;a detection circuit that detects the voltage of said battery;a switching means for selectively connecting and disconnecting the voltage of said battery to said main circuit;a key input detection means for detecting a key input for operating said portable radio transceiver and for outputting the key input information;a storage means for advance storing of a predetermined first voltage information representing a first voltage at which a remaining charge of said battery is nearly exhausted and below which the portable radio transceiver will not reliably operate, and a second voltage information representing a second voltage selectively predetermined by a user and being higher than said first voltage and sufficient to maintain operation of the portable radio transceiver for at least one calling operation;a processing means for comparing said battery voltage with said first voltage and said second voltage selectively while the portable radio transceiver is in a call-waiting state in accordance with key input information of said key input detection means, and deciding whether to cause said switching means to connect or disconnect said battery from said main circuit.