RECEPTION ELECTRIC FIELD CHANGE MONITOR DEVICE AND RECEPTION ELECTRIC FIELD CHANGE MONITOR METHOD

摘要

PROBLEM TO BE SOLVED: To provide a reception electric field change monitor device and a reception electric field change monitor method in a mobile terminal capable of lowering power consumption by having circuit constitution for comparing the reception voltage of the channel codec of an LSI with the set values of an upper limit and a lower limit. SOLUTION: A TRX part 2 receives LCCH signals and converts them to electric signals. A channel codec part 4 is constituted of a reception part 5, an upper limit register 6, a lower limit register 7 and a comparator 8 and the reception part 5 A/D converts the reception electric field of the LCCH signal and turns it to digital data DV. The digital data DVU of the upper limit of a reception electric field is set in the upper limit register 6 and the digital data DVD of the lower limit of the reception electric field are set in the lower limit register 7. The comparator 8 outputs interruption signals INT in the case that the digital data DV are larger than the digital data DVU and in the case that they are smaller than the digital data DVU by the comparison of the digital data DV, DVU and DVD. A CPU part 9 switches electric field display by the interruption signals INT.