| 摘要 |
PURPOSE:To provide a portable radio telephone equipment for preventing any illegal radio signal from being outputted by the runaway of the equipment. CONSTITUTION:This equipment is provided with a power supply part 11 for supplying power from a battery part 10 to the respective parts of the equipment when an input signal is at a high level, control part 9 for controlling the entire equipment, watchdog timer part 12 for outputting a high level after the lapse of fixed time when a supplied voltage exceeds a specified voltage time and for outputting a low level when a clock signal from the control part 9 is interrupted for fixed time, switch part 8 for outputting a high level while a switch is depressed, and OR logic part 13 for outputting the OR of a watchdog timer part output and a switch part output to the power supply part 11 and when the control part 9 starts, the clock is outputted to the watchdog timer part 12 but when the switch part output is turned to the high level, the clock is stopped. |
