| 摘要 |
PROBLEM TO BE SOLVED: To extend the operation time or a radio equipment by extending the use time of a battery without extremely the current quantity of the current which is made flow at the time of reduction of the voltage value of the battery. SOLUTION: This method is provided with a voltage detection means 21, which detects one of plural arbitrarily determined voltage values of the battery, and a storage means 22, which stores plural battery voltage data corresponding to arbitrarily determined voltage values of the battery and reads out battery voltage data corresponding to the voltage value detected at present, and consists of a reference voltage generation means 23 which selectively generates a reference level corresponding to read-out battery voltage data, an error voltage detection means 13 which compares the generated reference level and the value of a low frequency signal obtained from the transmission output to output the difference, and means 14, 10, and 11 which control the transmission output based on the difference and transmit it. Thus, the value of the transmission output is changed and set to a value corresponding to each value of the reference level. |
